his mother's
1 Kings 15:13
And also Maachah his mother, even her he removed from being queen, because she had made an idol in a grove; and Asa destroyed her idol, and burnt it by the brook Kidron.
2 Chronicles 11:20-22
20
And after her he took Maachah the daughter of Absalom; which bare him Abijah, and Attai, and Ziza, and Shelomith.
21
And Rehoboam loved Maachah the daughter of Absalom above all his wives and his concubines: (for he took eighteen wives, and threescore concubines; and begat twenty and eight sons, and threescore daughters.)
22
And Rehoboam made Abijah the son of Maachah the chief, to be ruler among his brethren: for he thought to make him king.
Maachah
2 Chronicles 13:2
He reigned three years in Jerusalem. His mother's name also was Michaiah the daughter of Uriel of Gibeah. And there was war between Abijah and Jeroboam.
Michaiah the daughter of Uriel
2 Chronicles 11:21
And Rehoboam loved Maachah the daughter of Absalom above all his wives and his concubines: (for he took eighteen wives, and threescore concubines; and begat twenty and eight sons, and threescore daughters.)