Epistle of Barnabas

Behold, therefore, we have been refashioned, as again He says in another prophet, "Behold, saith the Lord, I will take away from these, that is, from those whom the Spirit of the Lord foresaw, their stony hearts, and I will put hearts of flesh within them," because He was to be manifested in flesh, and to sojourn among us.

Further, what says He? "And there was a river flowing on the right, and from it arose beautiful trees; and whosoever shall eat of them shall live for ever." This meaneth, that we indeed descend into the water full of sins and defilement, but come up, bearing fruit in our heart, having the fear [of God] and trust in Jesus in our spirit. "And whosoever shall eat of these shall live for ever," This meaneth: Whosoever, He declares, shall hear thee speaking, and believe, shall live for ever.