Numbers 18:27-30 World English Bible (WEB)

27. Your wave offering shall be credited to you, as though it were the grain of the threshing floor, and as the fullness of the wine press.

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 of Yahweh, of all its best, even the holy part of it out 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.

Numbers 18