Exodus 40:15

וּמָשַׁחְתָּ֣ אֹתָ֗ם כַּאֲשֶׁ֤ר מָשַׁ֙חְתָּ֙ אֶת־אֲבִיהֶ֔ם וְכִהֲנ֖וּ לִ֑י וְ֠הָיְתָה לִהְיֹ֨ת לָהֶ֧ם מָשְׁחָתָ֛ם לִכְהֻנַּ֥ת עוֹלָ֖ם לְדֹרֹתָֽם׃

Καὶ ἐν τῷ μηνὶ τῷ πρώτῳ τῷ δευτέρῳ ἔτει ἐκπορευομένων ἐξ Αἰγύπτου νουμηνίᾳ, ἐστάθη ἡ σκηνή·

Greek text from Swete's edition, CC BY-SA 4.0

Y los ungirás como ungiste á su padre, y serán mis sacerdotes: y será que su unción les servirá por sacerdocio perpetuo por sus generaciones.

Anoint them just as you anointed their father, so that they may also serve Me as priests. Their anointing will qualify them for a permanent priesthood throughout their generations.”