22 Also thou shalt take of the ram the fat and the rump, and the fat that covereth the inwards, and the caul above the liver, and the two kidneys, and the fat that is upon them, and the right shoulder; for it is a ram of consecration:

23 And one loaf of bread, and one cake of oiled bread, and one wafer out of the basket of the unleavened bread that is before the Lord:

24 And thou shalt put all in the hands of Aaron, and in the hands of his sons; and shalt wave them for a wave offering before the Lord.

25 And thou shalt receive them of their hands, and burn them upon the altar for a burnt offering, for a sweet savour before the Lord: it is an offering made by fire unto the Lord.

26 And thou shalt take the breast of the ram of Aaron’s consecration, and wave it for a wave offering before the Lord: and it shall be thy part.

27 And thou shalt sanctify the breast of the wave offering, and the shoulder of the heave offering, which is waved, and which is heaved up, of the ram of the consecration, even of that which is for Aaron, and of that which is for his sons:

28 And it shall be Aaron’s and his sons’ by a statute for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering unto the Lord.

After the sprinkling of blood, the best parts of the ram would be placed in the hands of the priest, as well as a bread, a cake, and a wafer, and they would be waved in the air. At the same time, there was also a heave offering, which is not described, but mentioned in retrospect by verse 27. The right shoulder was apparently held by the priest and heaved upward.

It also says in verse 25 that all of these items were placed upon the altar and burned for a sweet savor to the Lord, though in verses 26-28 it sounds instead like these parts were given to the priests for their allowance of food. So were the items burned on the altar, or given to the priests? I can see two possibilities:

1. The “receive them” in verse 25 is not calling for the totality of the wave and heave offering. Perhaps only the fat, caul, and kidneys were burned upon the altar, while the breast and shoulder and breads were left for the priests.
2. All of this first offering, which was meant for the sanctification of Aaron and his sons, was burned upon the altar, but every heave and wave offering thereafter would be given to the priests.

With either interpretation, this offering seems to be establishing the unity between God and the priest. Because the priest went through the rituals of giving up his sins, dedicating his life to the good, and receive the purification of the anointing oil and blood, now the Lord will share from His own altar with the priest. Now that the disciple has been sanctified, he is invited to share in the meal that is laid on God’s table.