TSK · Numbers 15:21

And it shall be Aaron's and his sons' by a statute for ever from the children of Israel: for it [is] an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, [even] their heave offering unto the LORD.

And the priest the son of Aaron shall be with the Levites, when the Levites take tithes: and the Levites shall bring up the tithe of the tithes unto the house of our God, to the chambers, into the treasure house.