Genesis 9:18-23

18And the sons of Noah, that went forth from the ark, were Shem, and Ham, and Japheth: and Ham is the father of Canaan. 19These three were the sons of Noah: and of these was the whole earth overspread.

20And Noah began to be a husbandman, and planted a vineyard: 21and he drank of the wine, and was drunken; and he was uncovered within his tent. 22And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren without. 23And Shem and Japheth took a garment, and laid it upon both their shoulders, and went backward, and covered the nakedness of their father; and their faces were backward, and they saw not their father’s nakedness.