Genesis 9:22-24

YLT(i) 22 And Ham, father of Canaan, seeth the nakedness of his father, and declareth to his two brethren without. 23 And Shem taketh—Japheth also—the garment, and they place on the shoulder of them both, and go backward, and cover the nakedness of their father; and their faces are backward, and their father's nakedness they have not seen.
24 And Noah awaketh from his wine, and knoweth that which his young son hath done to him,