Similarly, R. Yehudah expounded (Bereshith 41:43) "And he (Pharaoh) had him ride in the chariot next to his, and they called before him "Avrech.": This is Joseph, who was a father ("av") in wisdom and young ("rach") in years — whereupon R. Yossi b. Dormaskith said to him: Yehudah berebbi, why do you distort the verses for us? I testify by heaven and earth that "avrech" signifies (bending of) the knees ("birkayim"). (Ibid.) "and he set him over all the land of Egypt": that all enter and leave by his command.