Deuteronomy 21:5

21:5 The priests the sons of Levi shall come near; for them Yahweh your God has chosen to minister to him, and to bless in the name of Yahweh; and according to their word shall every controversy and every stroke be.
-World English Bible

Other Translation

21:5 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]:
-King James Version