John Calvin's Commentary on the Bible

22 (Numbers 6:22)

Verse 22

22.And the Lord spake unto Moses. A part of the sacerdotal duties, of which mention is constantly made in the Law, is here briefly set forth; for God says that He had appointed the priests to bless the people. To this David seems to allude in the words:

"We have blessed you out of the house of the Lord.”
(
Psalms 118:26.)

This doctrine is especially profitable, that believers may confidently assure themselves that God is reconciled to them, when He ordains the priests to be witnesses and heralds of His paternal favor towards them. The word to bless is often used for to pray for blessings, which is the common duty of all pious persons; but this rite (as we shall see a little farther on) was an efficacious testimony of God’s grace; as if the priests bore from His own mouth the commandment to bless. But Luke shews that this was truly fulfilled in Christ, when he relates that “He lifted up His hands,” according to the solemn rite of the Law, to bless His disciples. (Luke 24:50.) In these words, then, the priests were appointed ambassadors to reconcile God to the people; and this in the person of Christ, who is the only sufficient surety of God’s grace and blessing. Inasmuch, therefore, as they then were types of Christ, they were commanded to bless the people. But it is worthy of remark, that they are commanded to pronounce the form of benediction audibly, and not to offer prayers in an obscure whisper; and hence we gather that they preached God’s grace, which the people might apprehend by faith.

- John Calvin's Commentary on the Bible