Deuteronomy 21:16-18

New King James Version

¹⁶ then it shall be, ^(A)on the day he bequeaths his possessions to his sons, that he must not bestow firstborn status on the son of the loved wife in preference to the son of the unloved, the true firstborn. ¹⁷ But he shall acknowledge the son of the unloved wife as the firstborn ^(B)by giving him a double portion of all that he has, for he ^(C)is the beginning of his strength; ^(D)the right of the firstborn is his.

The Rebellious Son

¹⁸ “If a man has a stubborn and rebellious son who will not obey the voice of his father or the voice of his mother, and who, when they have chastened him, will not heed them,