Midrash su I Samuele 9:1

... [What about all] the praise of Joseph, who exceeded in the honor of his father? And yet he did not enter into him all the time, such that were it not that they came to tell him, "Your father is sick," he would not have known! Rather this is to inform you of his righteousness. For he did not want to be alone with his father, lest he say to him, "How did your brothers act with you?" And [then] he would curse them.... Hence he did not go to his father all the time.)

“Naomi had an acquaintance of her husband’s, a mighty man of valor, from the family of Elimelekh, and his name was Boaz” (Ruth 2:1).
“Naomi had an acquaintance [moda] of her husband’s, a mighty man of valor” – moda means relative. Rabbi Abbahu said: If a giant marries a giantess, what do they produce? Mighty men of valor. Boaz married Ruth; what did they produce? David, “who knows how to play, a mighty man of valor, a man of war, understanding in matters, a comely man, and the Lord is with him” (I Samuel 16:18). “Who knows how to play” – [refers to his expertise] in Bible; “a mighty man of valor” – in Mishna; “a man of war” – he knows to negotiate the battle of Torah; “understanding in matters” – in good deeds; “a comely man” – in Talmud. Alternatively: “Understanding in matters” – he infers one matter from another matter; “a comely man” – who displays understanding in halakha; “and the Lord is with him” – the halakha is in accordance with his opinion.
“From the family of Elimelekh, and his name was Boaz” – the wicked precede their name: “Goliath was his name” (I Samuel 17:4); “Naval is his name” (I Samuel 25:25); “Sheva son of Bikhri was his name” (II Samuel 20:21). However, the righteous, their names precede them: “And his name was Kish” (I Samuel 9:1); “and his name was Saul” (I Samuel 9:2); “and his name was Yishai” (I Samuel 17:12); “and his name was Mordekhai” (Esther 2:5); “and his name was Elkana” (I Samuel 1:1). It is because they are similar to their Creator, as it is written: “But with My name, the Lord, I was not known to them” (Exodus 6:3).
They objected to him: “And his name was Laban” (Genesis 24:29). Rabbi Yitzḥak said: This is an obvious characteristic.¹⁴⁹He was extremely white [lavan] or was a senior judge who sought to clarify matters. Laban was not his real name. Rabbi Berekhya said: He was blatant [meluban] in his wickedness. But is it not written: The sons of Samuel, “the name of the firstborn was Yoel and the name of his second, Aviya” (I Samuel 8:2), [and] the Rabbis say: Just as this one was wicked, so too, that one was wicked? Rabbi Yehuda ben Rabbi Simon said: Because they changed their actions and merited the Divine Spirit, as it is stated: “The word of the Lord that was to Joel [Yoel] son of Petuel” (Joel 1:1).¹⁵⁰The midrash interprets Petuel as a reference to Samuel; see Bemidbar Rabba 10:5.

“The young woman who will please the king will reign in place of Vashti. The proposal pleased the king and he did so” (Esther 2:4).
“The young woman who will please the king” – who is fitting for this thing? ¹⁵Fit to raise the woman who would be chosen as queen. Mordekhai – “there was a Jewish man in the Shushan citadel, and his name was Mordekhai” (Esther 2:5).¹⁶This is the immediately following verse. This and the subsequent passages are all cases where the midrash addresses the juxtaposition of two verses. It asks about the first verse: who is fitting for this thing? It then finds the answer in the next verse.
Similarly, “God saw the children of Israel and God knew” (Exodus 2:25). Who is fitting for this matter? Moses – “And Moses was herding” (Exodus 3:1).
Similarly, “Samuel said to the men of Israel: Go, each man to his city” (I Samuel 8:22). Who is fitting for this thing [to be appointed king]? Saul, as it is stated: “There was a man of Benjamin, and his name was Kish…[and he had a son and his name was Saul…]” (I Samuel 9:1–2).
Similarly, “Saul and all Israel heard these words of the Philistine, and they were dismayed and were greatly afraid.” (I Samuel 17:11). Who is fitting for this thing [fighting Goliath]? David – “David was the son of that Efrati [from Bethlehem]” (I Samuel 17:12).
Rabbi Yehoshua bar Aviram said two things. It is written: “He [Yavin king of Canaan] oppressed the children of Israel strongly [beḥozka] for twenty years” (Judges 4:3). What is beḥozka? Rabbi Yitzḥak said: With cursing and blaspheming. That is what is written: “Your words have been harsh against Me” (Malachi 3:13). Who is fitting for this thing? Deborah, as it is written: “Deborah was a prophetess, wife of Lapidot” (Judges 4:4).
Rabbi Yehoshua bar Aviram said another: “The people, the princes of Gilad, said one to another: Who is the man who will begin to wage war against the children of Amon? He will be the head of all the inhabitants of Gilad” (Judges 10:18). Who is fitting for this thing? Yiftaḥ – “Yiftaḥ the Giladite was a mighty warrior” (Judges 11:1).

“There was a Judean man in the Shushan citadel, and his name was Mordekhai, son of Ya'ir, son of Shimi, son of Kish, a Benjamite” (Esther 2:5).
“There was a Judean man [ish] in the Shushan citadel” – ish teaches that Mordekhai, in his generation, was the equivalent of Moses, in his generation, as it is written about him: “And the man [veha’ish] Moses was very humble” (Numbers 12:3). Just as Moses stood in the breach, as it is written: “He said He would destroy them, were it not for Moses His chosen one, who stood before Him in the breach…” (Psalms 106:23); also Mordekhai did likewise: “A seeker of good for his people and spokesman of peace for all his descendants” (Esther 10:3).
Just as Moses taught Torah to Israel, as it is written: “See, I have taught you statutes and ordinances” (Deuteronomy 4:5), also Mordekhai did so, as it is written: “Matters of peace and truth” (Esther 9:30), and as it is written: “Acquire truth and do not sell” (Proverbs 23:23).
“And his name was Mordekhai” (Esther 2:5) – the wicked precede their names: “Naval was his name” (I Samuel 25:25); “Sheva ben Bikhri was his name” (II Samuel 20:21). However, the righteous, their names precede them: “And his name was Manoaḥ” (Judges 13:2); “And his name was Kish” (I Samuel 9:1); “And his name was Elkana” (I Samuel 1:1); “And his name was Boaz” (Ruth 2:1); “And his name was Mordekhai.” It is because they are similar to their Creator, as it is written: “But by My name, the Lord, I was not known by them” (Exodus 6:3).
“Judean” – why was he called Judean? Was he not a Benjaminite?⁶Mordekhai is identified as coming from the tribe of Benjamin in Esther 2:5. It is because he unified the name of the Holy One blessed be He⁷Actions which assert that there is only one God are referred to as “unifying the name.” before all creatures; that is what is written: “[And Mordekhai] would not bow and would not prostrate himself” (Esther 3:2). Was he contrary and violating the king’s decree? Rather, when Aḥashverosh commanded [everyone] to prostrate themselves to Haman, he [Haman] carved an idol [and set it] over his heart, intending that they prostrate themselves to the idol.
When Haman saw that Mordekhai would not prostrate himself to him, he was filled with fury. Mordekhai said to him: ‘There is a Master who exalts over all the exalted; how can I forsake him and prostrate myself to an idol?’ Because he unified the name of the Holy One blessed be He, he is called Judean [Yehudi], meaning by himself [yeḥidi].⁸Just as God is only one [yeḥidi] so was Mordekhai called yeḥidi.
Some say that he was the equivalent of Abraham in his generation. Just as Abraham allowed himself to be put into the fiery furnace and went about causing people to acknowledge the greatness of the Holy One blessed be He – that is what is written: “And the souls they had gotten in Ḥaran” (Genesis 12:5), so too, Mordekhai, in his time, people acknowledged the greatness of the Holy One blessed be He. That is what is written: “Many of the peoples of the land became Jews, as the fear of the Jews had fallen upon them” (Esther 8:17). He unified the name of the Holy One blessed be He, and sanctified it. Therefore, he is called yehudi, as it is written: “A Judean [yehudi] man” – don’t read it as yehudi, but rather, as yeḥidi.