Bible Verses About Tithes: Tithe of tithes for priests

"Tell the L'vi'im, 'When you take from the people of Isra'el the tenth of the produce which I have given you from them as your inheritance, you are to set aside from it a gift for ADONAI, one tenth of the tenth.

The cohen the descendant of Aharon is to be with the L'vi'im when the L'vi'im take tenths. The L'vi'im will bring the tenth of the tenth to the house of our God, to the storerooms for supplies.