Numbers 18:28-30

World English Bible

²⁸ Thus you also shall offer a wave offering to Yahweh of all your tithes, which you receive of the children of Israel; and of it you shall give Yahweh’s wave offering to Aaron the priest. ²⁹ Out of all your gifts, you shall offer every wave offering to Yahweh, of all its best parts, even the holy part of it.’

³⁰ “Therefore you shall tell them, ‘When you heave its best from it, then it shall be credited to the Levites as the increase of the threshing floor, and as the increase of the wine press.