וְאֶת־אַהֲרֹ֤ן וְאֶת־בָּנָיו֙ תִּפְקֹ֔ד וְשָׁמְר֖וּ אֶת־כְּהֻנָּתָ֑ם וְהַזָּ֥ר הַקָּרֵ֖ב יוּמָֽת׃ (פ)
און אַהרֹנען און זײַנע זין זאָלסטו באַפֿעלן, זײ זאָלן היטן זײער כּהונה, און דער פֿרעמדער װאָס גענענט זאָל געטײט װערן.
Rashi
ואת אהרן ואת בניו תפקד AND THOU SHALT CHARGE AARON AND HIS SONS — The word תפקד is an expression for “appointing” and not an expression for “counting” (although it is Kal, and usually “appointing” is expressed by the Hiphil of the verb; cf. Rashi on Numbers 1:50).
Sforno
ושמרו את כהנתם, concerning all matters involving the altar, the dividing curtain and what is beyond it, to ensure that the Levites not enter any of these domains.
Rashbam
ואת אהרן ואת בניו תפקד, you shall appoint Aaron and his sons to be in charge of the Levites, as in the word ויפקד in Genesis 40,4 where the warden of the jail appointed Joseph to be in charge of all the prisoners.
Rav Hirsch
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRashi
ושמרו את כהנתם AND THEY SHALL KEEP THEIR PRIESTS OFFICE — the receiving of the blood in holy vessels, the sprinkling of it, the burning of the fat and the other rites which are entrusted to the priests’ charge.