According to the number {d} that ye shall prepare, so shall ye do to every one according to their number.

(d) Every sacrifice of beasts must have their meat offering and drink offering according to this proportion.

Wesley's Notes

15:12 Their number - As many cattle as ye sacrifice, so many meal and drink - offerings ye shall offer.

Matthew Henry's Concise Commentary

15:1-21 Full instructions are given about the meat-offerings and drink-offerings. The beginning of this law is very encouraging, When ye come into the land of your habitation which I give unto you. This was a plain intimation that God would secure the promised land to their seed. It was requisite, since the sacrifices of acknowledgment were intended as the food of God's table, that there should be a constant supply of bread, oil, and wine, whatever the flesh-meat was. And the intent of this law is to direct the proportions of the meat-offering and drink-offering. Natives and strangers are placed on a level in this as in other like matters. It was a happy forewarning of the calling of the Gentiles, and of their admission into the church. If the law made so little difference between Jew and Gentile, much less would the gospel, which broke down the partition-wall, and reconciled both to God.