22 Then the Lord spoke to Moses, saying, 23 “Speak to the sons of Israel, saying, ‘You shall not eat any fat from an ox, a sheep or a goat. 24 Also the fat of an animalwhich dies and the fat of an animal torn by beasts may be put to any other use, but you must certainly not eat it. 25 For whoever eats the fat of the animal from which [o]an offering by fire is offered to the Lord, even the person who eats shall be cut off from his people. 26 You are not to eat any blood, either of bird or animal, in any of your dwellings. 27 Any person who eats any blood, even that person shall be cut off from his people.’”
28 Then the Lord spoke to Moses, saying, 29 “Speak to the sons of Israel, saying, ‘He who offers the sacrifice of his peace offerings to the Lord shall bring his offering to the Lord from the sacrifice of his peace offerings. 30 His own hands are to bring offerings by fire to the Lord. He shall bring the fat with the breast, that the breast may be [p]presented as a wave offering before the Lord. 31 The priest shall offer up the fat in smoke on the altar, but the breast shall belong to Aaron and his sons.32 You shall give the right thigh to the priest as a [q]contribution from the sacrifices of your peace offerings. 33 The one among the sons of Aaron who offers the blood of the peace offerings and the fat, the right thigh shall be his as his portion. 34 For I have taken the breast of the wave offering and the thigh of the [r]contribution from the sons of Israel from the sacrifices of their peace offerings, and have given them to Aaron the priest and to his sons as their due forever from the sons of Israel.
35 ‘This is [s]that which is consecrated to Aaron and [t]that which is consecrated to his sons from the offerings by fire to the Lord, in that day when he presented them to serve as priests to the Lord. 36 [u]These the Lord had commanded to be given them from the sons of Israel in the day that He anointed them. It is their due forever throughout their generations.’”
37 This is the law of the burnt offering, the grain offering and the sin offering and the guilt offering and the ordination offering and the sacrifice of peace offerings,38 which the Lord commanded Moses at Mount Sinai in the day that He commanded the sons of Israel to [v]present their offerings to the Lord in the wilderness of Sinai.
Here again we have God looking out for the priests. The animals sacrificed by the Jews didn’t often go to waste, they were still used for food and other purposes, just as if the animal had been butchered elsewhere. However, when they brought their sacrifice to the priest, a portion belonged to the priest. This was the priest’s job, and this was how they were taken care of. It is a reminder firstly, that God takes care of us, we are not the ones in control, He is. Then, secondly, it is a reminder to take care of our priest, pastor, etc. Those that have forsaken all else to do the work of God deserve our support, and it is not something we should grudgingly give, but cheerfully. “For God loves a cheerful giver.”