LXX Deut 21:5

καὶ οἱ ἱερεῖς οἱ Λευεῖται, ὅτι αὐτοὺς ἐπέλεξεν Κύριος ὁ θεὸς παρεστηκέναι αὐτῷ καὶ εὐλογεῖν ἐπὶ τῷ ὀνόματι αὐτοῦ, καὶ ἐπὶ τῷ στόματι αὐτῶν ἔσται πᾶσα ἀντιλογία καὶ πᾶσα ἁφή·

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.