Jubilees 25:1

And in the second year of this week in this jubilee, Rebecca called Jacob her son, and spake unto [2109 A.M.] him, saying: 'My son, do not take thee a wife of the daughters of Canaan, as Esau, thy brother, who took him two wives of the daughters of Canaan, and they have embittered my soul with all their unclean deeds: for all their deeds are fornication and lust, and there is no righteousness with them, for (their deeds) are evil.