Genesis 2:25
23 Then the man said, “This one at last is bone of my bones and flesh of my flesh; this one will be called ‘woman,’ for she was taken out of man.” 24 That is why a man leaves his father and mother and unites with his wife, and they become one family. 25 The man and his wife were both naked, but they were not ashamed.
Exodus 20:26
24 “‘You must make for me an altar made of earth, and you will sacrifice on it your burnt offerings and your peace offerings, your sheep and your cattle. In every place where I cause my name to be honored I will come to you and I will bless you. 25 If you make me an altar of stone, you must not build it of stones shaped with tools, for if you use your tool on it you have defiled it. 26 And you must not go up by steps to my altar, so that your nakedness is not exposed.’
Notes and References
"... Genesis actually inspired this claim, since at several points it presents Noah (Genesis 8:20), Abraham (Genesis 12:8, etc.), and others as building altars and offering sacrifices on them. How could they know the rules of sacrifices—which animals to offer, how they were to be prepared, and so forth—if someone did not teach them? From this developed the idea of an unbroken chain of priests stretching back to earliest times. But how far back did this chain go? It would be nice to have it start from the very beginning, that is, from Adam. But Adam is never said in the book of Genesis to have built an altar or offered a sacrifice to God and with good reason! After all, most of the narrative of Adam and Eve is taken up with their stay in the Garden, where they were naked, while the Torah clearly states that a priest’s “nakedness may not be exposed” when he makes an offering (Exodus 20:26) ..."
Kugel, James L. A Walk through Jubilees: Studies in the Book of Jubilees and the World of Its Creation (p. 41) Brill, 2012