Tertullian

And from that time, ever since the blessing which was pronounced upon man's generation, Genesis 1:28 the flesh and the soul have had a simultaneous birth, without any calculable difference in time; so that the two have been even generated together in the womb, as we have shown in our Treatise on the Soul. Contemporaneous in the womb, they are also temporally identical in their birth. The two are no doubt produced by human parents of two substances, but not at two different periods; rather they are so entirely one, that neither is before the other in point of time. [On the Resurrection of the Flesh 45]
Tertullian says this concerning polygamy of the Patriarchs- As I think, moreover, each pronouncement and arrangement is (the act) of one and the same God; who did then indeed, in the beginning, send forth a sowing of the race by an indulgent laxity granted to the reins of connubial alliances, until the world should be replenished, until the material of the new discipline should attain to forwardness: now, however, at the extreme boundaries of the times, has checked (the command) which He had sent out, and recalled the indulgence which He had granted; not without a reasonable ground for the extension (of that indulgence) in the beginning, and the limitation of it in the end. [On Exortation to Chastity 6]

For in the beginning of the world He gave to Adam himself and Eve a law, that they were not to eat of the fruit of the tree planted in the midst of paradise; but that, if they did contrariwise, by death they were to die. Which law had continued enough for them, had it been kept. For in this law given to Adam we recognise in embryo all the precepts which afterwards sprouted forth when given through Moses; that is, You shall love the Lord your God from your whole heart and out of your whole soul; You shall love your neighbour as yourself; You shall not kill; You shall not commit adultery; You shall not steal; False witness you shall not utter; Honour your father and mother; and, That which is another's, shall you not covet. For the primordial law was given to Adam and Eve in paradise, as the womb of all the precepts of God. In short, if they had loved the Lord their God, they would not have contravened His precept; if they had habitually loved their neighbour—that is, themselves—they would not have believed the persuasion of the serpent, and thus would not have committed murder upon themselves, by falling from immortality, by contravening God's precept; from theft also they would have abstained, if they had not stealthily tasted of the fruit of the tree, nor had been anxious to skulk beneath a tree to escape the view of the Lord their God; nor would they have been made partners with the falsehood-asseverating devil, by believing him that they would be "like God;" and thus they would not have offended God either, as their Father, who had fashioned them from clay of the earth, as out of the womb of a mother; if they had not coveted another's, they would not have tasted of the unlawful fruit.
Therefore, in this general and primordial law of God, the observance of which, in the case of the tree's fruit, He had sanctioned, we recognise enclosed all the precepts specially of the posterior Law, which germinated when disclosed at their proper times. For the subsequent superinduction of a law is the work of the same Being who had before premised a precept; since it is His province withal subsequently to train, who had before resolved to form, righteous creatures. [Answer to the Jews 2]

Adam had received from God the law of not tasting "of the tree of recognition of good and evil," with the doom of death to ensue upon tasting. However, even (Adam) himself at that time, reverting to the condition of a Psychic after the spiritual ecstasy in which he had prophetically interpreted that "great sacrament" with reference to Christ and the Church, and no longer being "capable of the things which were the Spirit's," yielded more readily to his belly than to God, heeded the meat rather than the mandate, and sold salvation for his gullet! He ate, in short, and perished; saved (as he would) else (have been), if he had preferred to fast from one little tree: so that, even from this early date, animal faith may recognise its own seed, deducing from thence onward its appetite for carnalities and rejection of spiritualities. I hold, therefore, that from the very beginning the murderous gullet was to be punished with the torments and penalties of hunger. Even if God had enjoined no preceptive fasts, still, by pointing out the source whence Adam was slain, He who had demonstrated the offence had left to my intelligence the remedies for the offence. [On Fasting 3]

It is certain that, from the very beginning of his nature, man was impressed with these instincts (of sleep). (Genesis 2:21). If you receive your instruction from God, (you will find) that the fountain of the human race, Adam, had a taste of drowsiness before having a draught of repose; slept before he laboured, or even before he ate, nay, even before he spoke; in order that men may see that sleep is a natural feature and function, and one which has actually precedence over all the natural faculties. From this primary instance also we are led to trace even then the image of death in sleep. For as Adam was a figure of Christ, Adam's sleep shadowed out the death of Christ, who was to sleep a mortal slumber, that from the wound inflicted on His side might, in like manner (as Eve was formed), be typified the church, the true mother of the living. This is why sleep is so salutary, so rational, and is actually formed into the model of that death which is general and common to the race of man. God, indeed, has willed (and it may be said in passing that He has, generally, in His dispensations brought nothing to pass without such types and shadows) to set before us, [Treatise on the Soul 43]

There were more ribs in Adam, and hands that knew no weariness in God; but not more wives in the eye of God. And accordingly the man of God, Adam, and the woman of God, Eve, discharging mutually (the duties of) one marriage, sanctioned for mankind a type by (the considerations of) the authoritative precedent of their origin and the primal will of God. Finally, "there shall be," said He, "two in one flesh," not three nor four. On any other hypothesis, there would no longer be "one flesh," nor "two (joined) into one flesh." These will be so, if the conjunction and the growing together in unity take place once for all. If, however, (it take place) a second time, or oftener, immediately (the flesh) ceases to be "one," and there will not be "two (joined) into one flesh," but plainly one rib (divided) into more. But when the apostle interprets, "The two shall be (joined) into one flesh" of the Church and Christ, according to the spiritual nuptials of the Church and Christ (for Christ is one, and one is His Church), we are bound to recognise a duplication and additional enforcement for us of the law of unity of marriage, not only in accordance with the foundation of our race, but in accordance with the sacrament of Christ. From one marriage do we derive our origin in each case; carnally in Adam, spiritually in Christ. The two births combine in laying down one prescriptive rule of monogamy. In regard of each of the two, is he degenerate who transgresses the limit of monogamy. Plurality of marriage began with an accursed man. Lamech was the first who, by marrying himself to two women, caused three to be (joined) "into one flesh." [Exortation to Chastity 5]

God calls out to Adam, Genesis 3:9, 11 Where are you? as if ignorant where he was; and when he alleged that the shame of his nakedness was the cause (of his hiding himself), He inquired whether he had eaten of the tree, as if He were in doubt. By no means; God was neither uncertain about the commission of the sin, nor ignorant of Adam's whereabouts. It was certainly proper to summon the offender, who was concealing himself from the consciousness of his sin, and to bring him forth into the presence of his Lord, not merely by the calling out of his name, but with a home-thrust blow at the sin which he had at that moment committed. For the question ought not to be read in a merely interrogative tone, Where are you, Adam? but with an impressive and earnest voice, and with an air of imputation, Oh, Adam, where are you?—as much as to intimate: you are no longer here, you are in perdition—so that the voice is the utterance of One who is at once rebuking and sorrowing. God put the question with an appearance of uncertainty, in order that even here He might prove man to be the subject of a free will in the alternative of either a denial or a confession, and give to him the opportunity of freely acknowledging his transgression, and, so far, of lightening it. In like manner He inquires of Cain where his brother was, just as if He had not yet heard the blood of Abel crying from the ground, in order that he too might have the opportunity from the same power of the will of spontaneously denying, and to this degree aggravating, his crime; and that thus there might be supplied to us examples of confessing sins rather than of denying them: so that even then was initiated the evangelic doctrine, "By your words you shall be justified, and by your words you shall be condemned." Matthew 12:37 Now, although Adam was by reason of his condition under law subject to death, yet was hope preserved to him by the Lord's saying, "Behold, Adam is become as one of us;" that is, in consequence of the future taking of the man into the divine nature. Then what follows? "And now, lest he put forth his hand, and take also of the tree of life, (and eat), and live for ever." Inserting thus the particle of present time, "And now," He shows that He had made for a time, and at present, a prolongation of man's life. Therefore He did not actually curse Adam and Eve, for they were candidates for restoration, and they had been relieved by confession. [Against Marcion 2.25]

We say, therefore, that the body falls to the ground by death, as indeed facts themselves show, in accordance with the law of God. For to the body it was said, ("Till you return to the ground, for out of it were you taken; for) dust you are, and unto dust shall you return." That, therefore, which came from the ground shall return to the ground. Now that falls down which returns to the ground; and that rises again which falls down. "Since by man came death, by man came also the resurrection." 1 Corinthians 15:21 Here in the word man, who consists of bodily substance, as we have often shown already. [Against Marcion 5.9]
Now, although the clay is offensive (for its poorness), it is now something else. What I possess is flesh, not earth, even although of the flesh it is said: "Dust you are, and unto dust shall you return." In these words there is the mention of the origin, not a recalling of the substance. The privilege has been granted to the flesh to be nobler than its origin, and to have happiness aggrandized by the change wrought in it. Now, even gold is earth, because of the earth; but it remains earth no longer after it becomes gold, but is a far different substance, more splendid and more noble, though coming from a source which is comparatively faded and obscure. In like manner, it was quite allowable for God that He should clear the gold of our flesh from all the taints, as you deem them, of its native clay, by purging the original substance of its dross.[On the Resurrection of the Flesh 6]