Deuteronomy 21:16-18

Modern English Version

¹⁶ then it must be, when he gives his sons the inheritance which he has, that he may not make the firstborn son of the loved come before the son of the unloved, who was indeed the firstborn. ¹⁷ On the contrary, he must acknowledge the son of the unloved for the firstborn, by giving him a double portion of all that he has, for he is the beginning of his strength. The right of the firstborn is his.

Dealing With a 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 disciplined him, will not listen to them,