You must present a tenth of that tithe as the Lord’s offering

Numbers 18:8-32

Then the Lord said to Aaron, “I myself have put you in charge of the offerings presented to me; all the holy offerings the Israelites give me I give to you and your sons as your portion, your perpetual share. You are to have the part of the most holy offerings that is kept from the fire. From all the gifts they bring me as most holy offerings, whether grain or sin[a] or guilt offerings, that part belongs to you and your sons. Eat it as something most holy; every male shall eat it. You must regard it as holy.

“I give you all the finest olive oil and all the finest new wine and grain they give the Lord as the firstfruits of their harvest. All the land’s firstfruits that they bring to the Lord will be yours. Everyone in your household who is ceremonially clean may eat it.

“But you must not redeem the firstborn of a cow, a sheep or a goat; they are holy. Splash their blood against the altar and burn their fat as a food offering, an aroma pleasing to the Lord. Their meat is to be yours, just as the breast of the wave offering and the right thigh are yours. Whatever is set aside from the holy offerings the Israelites present to the Lord I give to you and your sons and daughters as your perpetual share. It is an everlasting covenant of salt before the Lord for both you and your offspring.”

The Lord said to Aaron, “You will have no inheritance in their land, nor will you have any share among them; I am your share and your inheritance among the Israelites.

I give to the Levites all the tithes in Israel as their inheritance in return for the work they do while serving at the tent of meeting.

The Lord said to Moses,  “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.

Why?

The Lord declared everyone including Aaron and the Levites they could take the tenth of that tithe, but they also have to present a tenth of that tithe as the Lord's offering.

The Levites work for the tent of meeting, their work is to serve the Lord so they have no inheritance in their land, but all Isrealites have to devote their offering to the Lord, and part of it could be theirs. So the Lord is fair and takes care of everyone belongs to the Lord.

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祭司要保護利未心，利未人要保護以色列人，不可讓人隨意親近聖所。神給他們很重的責任，也給他們祝福。

-20 神給祭司的東西

21~32神給利未人的東西

沒有燒掉的東西都是舉祭，初熟的，頭生的，都是最好的都歸祭司。以色列人出產的十分之一都歸利未人，且是最好的部份。祭司和利未人都沒有產業，以色列人一定要把產業分給他們，要他們專心在神的託付工作上。耶和華就是他們的產業，生活沒有缺乏且超過以色列人。舉祭是最好的部份，收到的要再把十一拿出來，利未人拿到十分之11，比以色列人還要多，他們還要把所得的十分之一獻給祭司。每週主日，每天早晨晨更，收入的十分之一奉獻給神。重要的是我們的心態如何?沒有把最好的奉獻出來就是褻瀆聖物。存感恩的心，將初熟的果子獻給神。

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How?

Don't worry about what I am eating or where I am staying, if we devoted our tenth of the tithe, the Lord will give enough food to us. Thanks the Lord!