Why Moses Grew Twice and Went Out to His Brethren

Another interpretation (of Proverbs 22:29): "Do you see a man diligent in his work?" This speaks of Moses. What is written? "And it came to pass in those {many} days, when Moses had grown up, <that he went out to his brethren>" (Exodus 2:11). Rabbi Judah says: Do not all children grow up, that Scripture should say of him "had grown up"? Rather, he was five years old yet was found to be like one eleven years old. What is written? "And the child grew" (Exodus 2:10), [and] "and Moses grew up" (Exodus 2:11) — two times. Above, in stature; below, in greatness. What was his greatness? That he went out to his brethren.