Parallel
Deuteronomy 21:16
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
Then it shall be, when he maketh his sons to inherit that which he hath, that he may not make the son of the beloved firstborn before the son of the hated, which is indeed the firstborn:
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.