Parallel
Deuteronomy 21:16
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ἔσται ᾗ ἂν ἡμέρᾳ κατακληροδοτῇ τοῖς υἱοῖς αὐτοῦ τὰ ὑπάρχοντα αὐτοῦ οὐ δυνήσεται πρωτοτοκεῦσαι τῷ υἱῷ τῆς ἠγαπημένης ὑπεριδὼν τὸν υἱὸν τῆς μισουμένης τὸν πρωτότοκον
when that man assigns his inheritance to his sons he must not appoint the son of the beloved wife as the firstborn over the son of the unloved wife.