Мидраш к Шмот 3:4

(Is. 41:2:) WHO HAS AROUSED RIGHTEOUSNESS FROM THE EAST, IS CALLING HIM TO HIS FEET?⁵Cf. Gen. R. 43:3. The Holy One said: Abraham enlightened my world with his righteousness. Why? Because his whole generation was wicked; and from all of it I found only one, as stated (in Ezek. 33:24): ABRAHAM WAS ONE. Were there two? Only one with his righteousness. And so the Holy One said to him (in Gen. 22:11): ABRAHAM! ABRAHAM! Why two times? Because Abraham was righteous from his beginning to his end. Similarly < we read > (in Gen. 46:2): JACOB! JACOB! similarly (in Exod. 3:4): MOSES! MOSES! and similarly (in I Sam. 3:10): SAMUEL! SAMUEL! They were righteous from their beginning to their end. < Where is it shown >? From what we read on the matter (in Gen. 6:9): THESE ARE THE GENERATIONS OF NOAH: NOAH < WAS A RIGHTEOUS MAN>.⁶Cf. Gen. R. 30:4; M. Pss. 9:7.

...R’ Yehoshua be Levi said: If the nations of the world knew how good the Holy Temple was for them, they would surround it with fortifications in order to guard it. It was better for them than it was for Israel, just as Shlomo ordered his prayer “And also to the stranger, who is not of Your people Israel…” (Kings I 8:41 and it is written “…and do according to all that the stranger calls You for…” (Kings I 8:43) But when it comes to Israel, what is written? “…and give to each man according to his ways, whose heart You know…” (Chronicles II 6:30) If it was appropriate, He would give, and if not He would not. Don’t say that (they should value) the Holy Temple. Rather, if it were not for Israel the rain would not fall and the sun would not shine, because in their merit the Holy One brings plenty to His world. In the world to come the nations of the world will see how the Holy One is with Israel and they will come to cleave to them, as it says “In those days, when ten men of all the languages of the nations…” (Zechariah 8:23)

And it came to pass in those days, when Moses was grown up (Exodus 2:11). Moses was 20 years old at the time, and some say 40 years old.
"When Moses was grown up" - and does not everyone grow up? Rather, this tells you that he grew up [in a manner] unlike the whole world.
"He went out unto his brethren." This righteous man went out twice, and the Holy One Blessed is He wrote them one after another. "And he went out the second day" (Exodus 2:13)--this is two.
"And [he] looked on their burdens." What is, "And [he] looked?" For he would look upon their burdens and cry and say, "Woe is me unto you, who will provide my death instead of yours, for there is not more difficult labor than the labor of the mortar." And he would give of his shoulders [i.e. use his shoulders to] assist each one of them. Rabbi Eliezer the son of Rabbi Yose the Galilean said: [If] he saw a large burden on a small person and a small burden on a large person, or a man's burden on a woman and a woman's burden on a man, or an elderly man's burden on a young man and a young man's burden on an elderly man, he would leave aside his rank and go and right their burdens, and act as though he were assisting Pharaoh. The Holy One Blessed is He said: You left aside your business and went to see the sorrow of Israel, and acted toward them as brothers act. I will leave aside the upper and the lower [i.e. ignore the distinction between Heaven and Earth] and talk to you. Such is it written, " And when the LORD saw that [Moses] turned aside to see" (Exodus 3:4). The Holy One Blessed is He saw Moses, who left aside his business to see their burdens. Therefore, "God called unto him out of the midst of the bush" (ibid.).