Those were the appointed men. The text mentions these three—Heman, Asaph, and Ethan—who were chiefs of clans of the Levites. For their honor, it provides the genealogy of each of them back to Levi. In fact, in the case of Heman, who was greater and more highly regarded than the other two, it provides the genealogy back to our father Jacob—saying “son of Israel” in connection with him (v. 23)—whereas for the other two it says “son of Levi” (vv. 28, 32) and no more. Indeed, because he was more highly regarded than the others, he would stand in the middle when performing music, with Asaph on his right (v. 24) and Ethan on his left (v. 29). But our Sages explain midrashically (Genesis Rabbah 98:5) that the reason it says “son of Israel” in the genealogy of Heman is that he was a descendant of Korah. For our father Jacob said, “Let not my being be included in their assembly” (Genesis 49:6), meaning that my name should not be mentioned in connection with assemblies for which they come together on their own (in the Torah it indeed says, “Korah son of Izhar son of Kohath son of Levi” [Num 16:1]); but in connection with assemblies for which they are gathered together by David for the service of God, my name should be mentioned. So for this reason, it says “sons of Israel.” In this genealogy of Heman, one finds names that are altered from the form that the text utilized above (vv. 7–13). This [feature] is common; one sees it in many places. Some [individuals] had two names: people would call them by one name on one occasion and by another on another occasion. And some people’s names would change a little bit so that the letters of one [version of the] name are similar to those of the other. They were not particular about this, as with “Toah” mentioned here (v. 19), whom the text earlier calls “Tahath” and in the book of Samuel “Tohu” (1 Samuel 1:1). Similarly, here it mentions “Zuph” (v. 20) but above “Zophai” (v. 11). And so for Eliel (v. 19), whom above it calls “Eliab” (v. 12) and in the book of Samuel “Elihu” (1 Samuel 1:1).