And Noah built an altar unto the LORD; and took of every clean beast, and of every clean fowl, and offered burnt offerings on the altar.
All Commentaries on Genesis 8:20 Go To Genesis 8
Augustine of Hippo
AD 430
[The clean and the unclean] were together in the ark, but they were not equally pleasing to the Lord as a savor of sacrifice, for after the deluge Noah offered sacrifice to God of the clean, not of the unclean.
