Ravina asked one of the Rabbis who expounded Aggadah before him for the origin of the Rabbinic saying, "The memory of the righteous shall be for a blessing." The Rabbi replied that says, "The memory of the righteous shall be for a blessing." Ravina asked from where in the Torah one might derive that teaching. The Rabbi answered that says, "Shall I hide from Abraham that which I am doing?" And right after that mention of Abraham's name, God blessed Abraham in , saying, "Abraham shall surely become a great and mighty nation."