Parallel
Deuteronomy 21:16
Swete's Septuagint · Berean Standard Bible
καὶ ἔσται ᾗ ἂν ἡμέρᾳ κατακληρονομῇ τοῖς υἱοῖς αὐτοῦ τὰ ὑπάρητις χοντα αὐτοῦ, οὐ δυνήσεται πρωτοτοκεῦσαι τῷ υἱῷ τῆς ἠγαπημένης, 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.