Bible Verses About Priests: During patriarchal age heads of families acted as

And Noah buildeth an altar to Jehovah, and taketh of every clean beast, and of every clean fowl, and causeth burnt-offerings to ascend on the altar;

And he removeth from thence towards a mountain at the east of Beth-El, and stretcheth out the tent (Beth-El at the west, and Hai at the east), and he buildeth there an altar to Jehovah, and preacheth in the name of Jehovah.

and he buildeth there an altar, and proclaimeth at the place the God of Bethel: for there had God been revealed unto him, in his fleeing from the face of his brother.