Leviticus 9:22-23

9:22 Then Aaron lifted up his hands toward the people and blessed them and descended from making the sin offering, the burnt offering, and the peace offering. 9:23 Moses and Aaron then entered into the Meeting Tent. When they came out, they blessed the people, and the glory of the Lord appeared to all the people.

Numbers 6:23-27

6:23 “Tell Aaron and his sons, ‘This is the way you are to bless the Israelites. Say to them:

6:24 “The Lord bless you and protect you;

6:25 The Lord make his face to shine upon you,

and be gracious to you;

6:26 The Lord lift up his countenance upon you

and give you peace.”’

6:27 So they will put my name on the Israelites, and I will bless them.”

Deuteronomy 21:5

21:5 Then the Levitical priests will approach (for the Lord your God has chosen them to serve him and to pronounce blessings in his name, and to decide every judicial verdict)