וְלִבְנֵ֣י לֵוִ֔י הִנֵּ֥ה נָתַ֛תִּי כָּל־מַֽעֲשֵׂ֥ר בְּיִשְׂרָאֵ֖ל לְנַחֲלָ֑ה חֵ֤לֶף עֲבֹֽדָתָם֙ אֲשֶׁר־הֵ֣ם עֹֽבְדִ֔ים אֶת־עֲבֹדַ֖ת אֹ֥הֶל מוֹעֵֽד׃
And unto the children of Levi, behold, I have given all the tithe in Israel for an inheritance, in return for their service which they serve, even the service of the tent of meeting.
Find Mishnaic references to Numbers 18:21: , passages from the 63 tractates of the Mishnah.