וְנָתַתָּה֙ אֶת־הַלְוִיִּ֔ם לְאַהֲרֹ֖ן וּלְבָנָ֑יו נְתוּנִ֨ם נְתוּנִ֥ם הֵ֙מָּה֙ ל֔וֹ מֵאֵ֖ת בְּנֵ֥י יִשְׂרָאֵֽל׃
זאָלסט געבן די לוִיִים צו אַהרֹנען און צו זײַנע זין; אָפּגעגעבן זײַנען זײ אָפּגעגעבן צו אים פֿון די קינדער פֿון ישׂראל.
Sforno
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.
Rashbam
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.
Siftei Chakhamim
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRav Hirsch
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRashi
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]”.