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)

Deuteronomy 30:1

The Results of Covenant Reaffirmation

30:1 “When you have experienced all these things, both the blessings and the curses I have set before you, you will reflect upon them in all the nations where the Lord your God has banished you.