Numbers 6:23

On this wise ye shall bless the children of Israel. — The occasions on which this blessing was used are not recorded. The blessing itself, which marks in a special manner the spiritual character of the chosen people, consists of three double clauses. In each of these three clauses the sacred name Jehovah is repeated, and there is a rising gradation in the blessing invoked, until it culminates in that peace which is the highest of those gifts that God can bestow and that man can possess. There has been commonly recognised in this blessing an allusion to the doctrine of the Trinity. Mention is made in Leviticus 9:22 of a blessing pronounced by Aaron upon the people, but no form of words is found there.