Numbers 5:9

וכל תרומה וגו׳ AND EVERY HEAVE OFFERING … WHICH THEY BRING UNTO THE PRIEST] — R. Ishmael asked, “Do they then have to bring the heave-offering to the priest; does he not have to go around the granaries begging for it? What, then, is the meaning of ‘which they bring unto the priest’? It refers to the first fruits of which it is said, (Exodus 23:19) ‘[The first of the first fruits of thy ground] thou shalt bring into the house of the Lord they God’, but I do not know what is to be done with them, (i.e., this is nowhere stated). Scripture therefore states here, ‘[and every heave-offering, …which they bring] unto the priest, shall be his’ — Scripture comes and teaches you with respect to the first fruits that they must be given to the priest” (Sifrei Bamidbar 5).

וְכׇל־תְּרוּמָ֞ה לְכׇל־קׇדְשֵׁ֧י בְנֵי־יִשְׂרָאֵ֛ל אֲשֶׁר־יַקְרִ֥יבוּ לַכֹּהֵ֖ן ל֥וֹ יִהְיֶֽה׃

And every offering of all the holy things of the children of Yisra᾽el, which they bring to the priest, shall be his.