Numbers 8:18

כִּי נְתֻנִים נְתֻנִים הֵמָּה לִי מִתּוֹךְ בְּנֵי יִשְׂרָאֵל תַּחַת פִּטְרַת כָּל־רֶחֶם בְּכוֹר כֹּל מִבְּנֵי יִשְׂרָאֵל לָקַחְתִּי אֹתָם לִֽי

For they are wholly given unto Me from among the children of Israel; instead of all that openeth the womb, even the first-born of all the children of Israel, have I taken them unto Me.

כִּי לִי כָל־בְּכוֹר בִּבְנֵי יִשְׂרָאֵל בָּאָדָם וּבַבְּהֵמָה בְּיוֹם הַכֹּתִי כָל־בְּכוֹר בְּאֶרֶץ מִצְרַיִם הִקְדַּשְׁתִּי אֹתָם לִֽי

For all the first-born among the children of Israel are Mine, both man and beast; on the day that I smote all the first-born in the land of Egypt I sanctified them for Myself.

וָאֶתְּנָה אֶת־הַלְוִיִּם נְתֻנִים לְאַהֲרֹן וּלְבָנָיו מִתּוֹךְ בְּנֵי יִשְׂרָאֵל לַעֲבֹד אֶת־עֲבֹדַת בְּנֵֽי־יִשְׂרָאֵל בְּאֹהֶל מוֹעֵד וּלְכַפֵּר עַל־בְּנֵי יִשְׂרָאֵל וְלֹא יִהְיֶה בִּבְנֵי יִשְׂרָאֵל נֶגֶף בְּגֶשֶׁת בְּנֵֽי־יִשְׂרָאֵל אֶל־הַקֹּֽדֶשׁ

And I have given the Levites— they are given to Aaron and to his sons from among the children of Israel, to do the service of the children of Israel in the tent of meeting, and to make atonement for the children of Israel, that there be no plague among the children of Israel, through the children of Israel coming nigh unto the sanctuary.’

וַיַּעַשׂ מֹשֶׁה וְאַהֲרֹן וְכָל־עֲדַת בְּנֵי־יִשְׂרָאֵל לַלְוִיִּם כְּכֹל אֲשֶׁר־צִוָּה יְהוָה אֶת־מֹשֶׁה לַלְוִיִּם כֵּן־עָשׂוּ לָהֶם בְּנֵי יִשְׂרָאֵֽל

Thus did Moses, and Aaron, and all the congregation of the children of Israel, unto the Levites; according unto all that the LORD commanded Moses touching the Levites, so did the children of Israel unto them.