Bereshis 48:15-16

And he made on Yosef a brocha, and said, HaElohim, before whom my Avot Avraham and Yitzchak did walk, HaElohim Who was Roeh to me all my life long unto this day, The Malach which redeemed me from kol rah, may he make a brocha on the ne'arim, and let my shem be named on them, and the shem of my Avot Avraham and Yitzchak; and let them grow into a multitude in the midst of ha'aretz.