Num 18:26

וְאֶל־הַלְוִיִּ֣ם תְּדַבֵּר֮ וְאָמַרְתָּ֣ אֲלֵהֶם֒ כִּֽי־תִ֠קְחוּ מֵאֵ֨ת בְּנֵֽי־יִשְׂרָאֵ֜ל אֶת־הַֽמַּעֲשֵׂ֗ר אֲשֶׁ֨ר נָתַ֧תִּי לָכֶ֛ם מֵאִתָּ֖ם בְּנַחֲלַתְכֶ֑ם וַהֲרֵמֹתֶ֤ם מִמֶּ֨נּוּ֙ תְּרוּמַ֣ת יְהוָ֔ה מַעֲשֵׂ֖ר מִן־הַֽמַּעֲשֵֽׂר׃

“Speak to the Levites and tell them: ‘When you receive from the Israelites the tithe that I have given you as your inheritance, you must present part of it as an offering to the LORD—a tithe of the tithe.