Genesis 9:22-25

22And Ham, the father of Canaan, saw the nakedness of his father and told his two brothers outside. 23Then Shem and Japheth took a garment, laid it on both their shoulders, and walked backward and covered the nakedness of their father. Their faces were turned backward, and they did not see their father’s nakedness. 24When Noah awoke from his wine and knew what his youngest son had done to him, 25he said, “Cursed be Canaan; a servant of servants shall he be to his brothers.”