מדרש על שמואל א 17:14

“It was during the days of Aḥashverosh; that [hu] Aḥashverosh who reigned from India to Kush, one hundred and twenty-seven provinces” (Esther 1:1). Hu [appears] five [times] for evil, and five for good. Five for evil: “He [hu] was a mighty hunter”⁴Nimrod. (Genesis 10:9); “he is [hu] Esau, father of Edom” (Genesis 36:43); “this is [hu] Datan and Aviram” (Numbers 26:9); “he is [hu] King Aḥaz” (II Chronicles 28:22); “that [hu] Aḥashverosh” (Esther 1:1). Five for good: “Abram, he is [hu] Abraham” (I Chronicles 1:27); “that [hu] Aaron and Moses…that [hu] Moses and Aaron” (Exodus 6:26–27); “David was [hu] the youngest” (I Samuel 17:14); “he [hu], Yeḥizhiyahu” (II Chronicles 32:30); “he [hu], Ezra, came up from Babylon” (Ezra 7:6). Rabbi Berekhya said in the name of the Rabbis from there: We have one that is better than all of them: “He is [hu] the Lord our God; His judgments are throughout the land” (Psalms 105:7), whose attribute of mercy is forever.

The same Ahasuerus; i.e., he was the same in his wickedness from beginning to end. (Gen. 36, 43) This is Esau; i.e., the same in wickedness from beginning to end; (II Chr. 28, 22) He, King Ahaz; i.e., the same in wickedness always; and so is meant (Num. 26, 9) These are that Dathan and Abriam. And so it is also with the righteous (I Chr. 1, 27) Abram — the same is Abraham; i.e., Abraham was the same in righteousness from the beginning to the end; (Ex. 6, 26) These are that Aaron and Moses; i.e., they were the same in righteousness from beginning to end; (I Sam. 17, 14) And David was the youngest, that means he conducted himself from beginning to end, as in his youth; as in his youth he humbled himself before one greater than he in order to learn the Torah, so also when he was a king he was modest before a man superior to him in wisdom and tried to learn the Torah from him.

(Ib. b) R. Simon b. Pazi raised the following contradiction: "The passage says (Gen. 1, 16), And God made the two great lights; and further it says, the greater light and the lesser light. The moon said before the Holy One, praised be He! 'Sovereign of the Universe, is it possible for two kings to use the same crown (to occupy an equal rank)?' Whereupon the Lord replied: Go and make thyself smaller (be reduced). 'Sovereign of the Universe,' pleaded the moon before the Lord, 'Is it because I said to you a worthy thing that I should make myself smaller?' 'Go and rule the day and the night,' said the Lord to her. The moon pleaded further: 'Of what avail will my light be; for a lamp at noon what good could it do?' The Lord said to her: 'Go [and be satisfied] for Israel will count their days [of the month] and years after thee (the lunar system).' 'The days are impossible to be counted unless it is after the solstice,' complained the moon; 'for the passage says (Gen. 1, 14) And let them be for signs, and for seasons, and for days and years.' 'You can go [and be satisfied],' the Lord said to her, 'for the righteous will be called in your name: Jacob the little (Amos, 7); Samuel the little (I Sam. 17); David the little.' The Lord observed that the moon was not satisfied; He therefore said: 'Bring an atonement for Me because I caused the inferiority of the moon.' " This is meant by Resh Lakish; for Resh Lakish said: "What does the [strange] expression of the Torah in connection with the goat-offering of the new moon mean? For it says (Num. 28, 15) Unto God. The Holy One, praised be He! said: This goat-offering shall be an atonement for Me, because I caused the inferiority of the moon.' "