2 Chronicles 21:3

²³He dealt wisely, and dispersed some of his sons throughout all the lands of Judah and Benjamin, to every fortified city. He gave them food in abundance; and he sought many wives for them.

¹⁵If a man has two wives, the one beloved and the other hated, and they have borne him children, both the beloved and the hated, and if the firstborn son is hers who was hated, ¹⁶then it shall be, in the day that he causes his sons to inherit that which he has, that he may not give the son of the beloved the rights of the firstborn before the son of the hated, who is the firstborn; ¹⁷but he shall acknowledge the firstborn, the son of the hated, 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.

⁵Rehoboam lived in Jerusalem, and built cities for defense in Judah.

⁶but Abraham gave gifts to the sons of Abraham’s concubines. While he still lived, he sent them away from Isaac his son, eastward, to the east country.