Tafsiran Bilangan 3:9: Rashi, Sforno, Rashbam & Siftei Chakhamim

נתונים המה לו THEY ARE GIVEN UNTO HIM as a help.

נתונים נתונים המה לו, all their (the Levites’) service was to be performed at the instruction of Aaron, to whom the Levites had been delegated by the people.

נתונים,נתונים, the repetition of the word is similar to the repetition נתן תתן להם אחזת נחלה, “be sure to give” in English, in Numbers 27,7.

מאת בני ישראל has the same meaning as FROM AMONG THE MIDST OF (מתוך) THE CHILDREN OF ISRAEL, that is to say, they have been set aside from among the rest of the congregation for this purpose by a decree of the Omnipresent, and it is He who gave them (the Levites) to him, as it is said (Numbers 8:19) “And “I” have given the Levites as a gift [to Aaron]”.