Numbers 18:26

26 Command the Levites, and declare unto them: When you shall receive of the children of Israel the tithes, which I have given you, offer the firstfruits of them to the Lord, that is to say, the tenth part of the tenth:

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 be content with the oblation or tithes, which I have separated for their uses and necessities.

25 And the Lord spoke to Moses, saying:

26 Command the Levites, and declare unto them: When you shall receive of the children of Israel the tithes, which I have given you, offer the firstfruits of them to the Lord, that is to say, the tenth part of the tenth:

27 That it may be reckoned to you as an oblation of firstfruits, as well of the barnfloors as of the winepresses:

28 And of all the things of which you receive tithes, offer the firstfruits to the Lord, and give them to Aaron the priest.