Rashi on Genesis 9:26/רש"י על בראשית ט׳:כ״ו

1ברוך ה' אלהי שם BLESSED BE THE ETERNAL, THE GOD OF SHEM, who will in days to come carry out his promise to his descendants to give them the land of Canaan.

2ויהי AND MAY HE BE — Canaan — their servant serving and paying tribute (Cp. Josh. 16:10).