Numbers 18:26

Moreover, you shall speak and say to the Levites , When you take from the people of Israel the tithe that I have given you from them for your inheritance , then you shall present a contribution from it to the Lord , a tithe of the tithe .

“Speak to the Levites and say to them: ‘When you receive from the Israelites the tithe I give you as your inheritance, you must present a tenth of that tithe as the Lord`s offering.

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.