Genesis 9:22-23

22Canaan's father, Ham, saw that Noah was not wearing any clothes. He went out of the tent. He told his two brothers what he had seen.

23Then Shem and Japheth took Noah's coat and they put it between their shoulders. They walked into Noah's tent with their backs to Noah. In this way they covered their father with the coat. They looked away from their father so that they did not see him. They did this because Noah was not wearing any clothes.