Midrash sa 2 Mga Hari 4:9: Vayikra Rabbah & Sifrei Devarim

Rabbi Yehuda ben Pazi said: Why was the portion of forbidden sexual relations juxtaposed to the portion of “[you shall be] holy”? It is to teach you that everywhere that you find restraint from forbidden sexual relations, you find holiness. This is consistent with another statement of Rabbi Yehuda ben Pazi, who said: Anyone who restrains himself from forbidden sexual relations is called holy. Rabbi Yehoshua ben Levi cites it from the Shunamite woman. That is what is written: “She said to her husband: Behold now, I know that the man of God is holy” (II Kings 4:9). Rabbi Yona said: He is holy, but his attendants are not holy. That is what is written: “Geiḥazi came to push her away [lehodfah]” (II Kings 4:27). Rabbi Yosei bar Ḥanina said: He pushed her away by the glory of her beauty [behod yofyah], by her breasts.
Rabbi Aivun said: It teaches¹¹Rabbi Aivun is commenting on the fact that the Shunamite woman referred to the prophet Elisha as holy. that he had never looked at her. The Rabbis say: [It teaches] that she never saw a drop of semen on his sheet. The maidservant of Rabbi Yishmael bar Rav Yitzḥak said: I would tend to the garments of my master, and never did I find anything untoward on the garments of my master.
Rabbi Yehoshua ben Levi said: Why was the portion of forbidden sexual relations juxtaposed to the portion of “[you shall be] holy”? It is to teach you that everywhere that you find restraint regarding forbidden sexual relations, you find holiness. There are many verses for this. “[They shall not marry] a licentious woman or a profaned woman” (Leviticus 21:7), [is followed by the verse]: “You shall sanctify him, for he offers the food of your God, [he shall be holy to you]” (Leviticus 21:8). “A widow or a divorcee, or a profaned woman, or a licentious woman, [these he shall not marry]…and he shall not profane his offspring” (Leviticus 21:14–15). And this: “Speak to the entire congregation of the children of Israel…” (Leviticus 19:2).

"the man of G-d": There are ten who were called "the man of G-d": Moses — "This is the blessing wherewith Moses, the man of G-d, blessed"; Elkanah — (I Samuel 2:27) "And the man of G-d came to Eli"; Samuel — (Ibid. 9:6) "Behold, there is a man of G-d in this city"; David — (Nechemiah 12:24) "by the command of David, the man of G-d"; Shemayah — (I Kings 12:2) "The word of the L-rd came to Shemayah, the man of G-d; Iddo — (Ibid. 13:1) "And a man of G-d came from Judah by the word of the L-rd"; Eliyahu — (II Kings 1:13) "Man of G-d, may my soul be worthy in your eyes"; Elisha — (Ibid. 4:9) "He is a holy man of G-d"; Michah — (I Kings 20:28) "And the man of G-d came and spoke to the king of Israel"; Amotz — (II Chronicles 25:7) "And a man of G-d came to him."