Genesis 9:22-24

9:22 Ham, the father of Canaan, saw his father’s nakedness and told his two brothers who were outside. 9:23 Shem 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.

9:24 When Noah awoke from his drunken stupor he learned what his youngest son had done to him.