Genesis 2:22-25

Then the LORD God made a woman from the rib, and he brought her to the man. “At last!” the man exclaimed. “This one is bone from my bone, and flesh from my flesh! She will be called ‘woman,’ because she was taken from ‘man.’” This explains why a man leaves his father and mother and is joined to his wife, and the two are united into one. Now the man and his wife were both naked, but they felt no shame.