Midrash sur La Genèse 46:2

(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.

Another interpretation (of Gen. 6:9): THESE ARE THE GENERATIONS OF NOAH; NOAH: Why two times? The Holy One said: < It was > in order to persuade²³Gk.: peithein, peisai in the aorist. all those who enter the world, lest they think of saying: He was only righteous in his generation. The Holy One said: For me he is the equal of Abraham. R. Judah bar Shallum [the Levite] said: < His name > is stated two times (in Gen. 22:11): ABRAHAM, ABRAHAM. So also with Jacob (in Gen. 46:2); so also with Moses (in Exod. 3:4); so also with Samuel (in I Sam. 3:10); so also with Noah (here in Gen. 6:9). < The double name is used > in order to give equality to the righteous ones.

12) "Moshe, Moshe," "Avraham, Avraham," "Yaakov, Yaakov," "Shmuel, Shmuel" — an expression of affection and of prompting to zeal. Another connotation: "Moshe, Moshe" — He is "Moshe" before being spoken to; he is (the same, righteous) "Moshe" after being spoken to.