וַיַּ֗רְא חָ֚ם אֲבִ֣י כְנַ֔עַן אֵ֖ת עֶרְוַ֣ת אָבִ֑יו וַיַּגֵּ֥ד לִשְׁנֵֽי־אֶחָ֖יו בַּחֽוּץ׃
And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren without.
Read kabbalistic (mystical) interpretation of Genesis 9:22: and classical mystical sources.