Deuteronomy 21:5

And the priests, the sons of Levi, shall come forward, for the Lord your God has chosen them to serve Him and pronounce blessings in His name and to give a ruling in every dispute and case of assault.
BSB · Berean Standard Bible
And the priests the sons of Levi shall come near; for them the Lord thy God hath chosen to minister unto him, and to bless in the name of the Lord; and by their word shall every controversy and every stroke be tried:

Note word: Heb. mouth

KJV · King James Version
The priests the sons of Levi shall come near, for them the Lord your God has chosen to minister to him, and to bless in the Lord’s name; and according to their word shall every controversy and every assault be decided.
WEB · World English Bible
And the priests the sons of Levi shall come near; for them Jehovah thy God hath chosen to minister unto him, and to bless in the name of Jehovah; and according to their word shall every controversy and every stroke be.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

for them
Deuteronomy 10:8; Deuteronomy 18:5; Numbers 6:22–27; 1 Chronicles 23:13
by their word
Deuteronomy 17:8–12; Malachi 2:7