And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren outside.
All Commentaries on Genesis 9:22 Go To Genesis 9
Justin Martyr
AD 165
In the blessings with which Noah blesses his two sons, he also curses his son’s son. For the prophetic Spirit would not curse that son himself, since he had already been blessed by God, together with the other sons of Noah. But, since the punishment of the sin was to be transmitted down to all the posterity of the son who laughed at his father’s nudity, he made the curse begin with the son’s son.