Numbers 18:26

Overview - Numbers 18
1	The charge of the priests and Levites.
8	The priests' portion.
21	The Levites' portion.
25	The heave offering to the priests out of the Levites' portion.

Numbers 18:26  (King James Version)
Thus speak unto the Levites, and say unto them, When ye take of the children of Israel the tithes which I have given you from them for your inheritance, then ye shall offer up an heave offering of it for the LORD, even a tenth part of the tithe.