Numbers 18:26

26 `And unto the Levites thou dost speak; and thou hast said unto them, When ye take from the sons of Israel the tithe which I have given to you from them, for your inheritance, then ye have lifted up from it the heave-offering of Jehovah, a tithe of the tithe;

Numbers 18:26 Meaning and Commentary

Numbers 18:26

Thus speak unto the Levites, and say unto them
Aaron was to tell them what a provision would be made for them on account of their service, but Moses was to inform them what part Aaron was to have out of it:

when ye take of the children of Israel the tithes which I have given
you from them for your inheritance;
which was done at the time of their harvest, and of the ingathering of the fruits of the earth:

then ye shall offer up an heave offering of it for the Lord;
in token of gratitude for the liberal provision he had made for the maintenance of them:

[even] a tenth [part] of the tithe;
a tenth part out of the tenth of the produce of the land of Israel.

Numbers 18:26 In-Context

24 but the tithe of the sons of Israel which they lift up to Jehovah, a heave-offering, I have given to the Levites for inheritance; therefore I have said of them, In the midst of the sons of Israel they have no inheritance.'
25 And Jehovah speaketh unto Moses, saying,
26 `And unto the Levites thou dost speak; and thou hast said unto them, When ye take from the sons of Israel the tithe which I have given to you from them, for your inheritance, then ye have lifted up from it the heave-offering of Jehovah, a tithe of the tithe;
27 and your heave-offering hath been reckoned to you as corn from the threshing-floor, and as fulness from the wine-vat;
28 so ye do lift up -- ye also -- the heave-offering of Jehovah from all your tithes which ye receive from the sons of Israel; and ye have given from it the heave-offering of Jehovah to Aaron the priest;
Young's Literal Translation is in the public domain.