Genesis 9:23-25

23Shem and Japheth took the garment and placed it on their shoulders. Then they walked in backwards and covered up their father’s nakedness. Their faces were turned the other way so they did not see their father’s nakedness.

24When Noah awoke from his drunken stupor he learned what his youngest son had done to him.

25So he said, “Cursed be Canaan! The lowest of slaves he will be to his brothers.”