Ought you not to know that the LORD God of Israel gave the kingship over Israel forever to David and his sons by a covenant of salt?
Abijah's mother was called Maachah, the daughter of Absalom, Ch2 11:20; here she is called Michaiah, the daughter of Uriel. It is most probable that she was a grand-daughter of Absalom, by his daughter Tamar (Sa2 14:27), and that her immediate father was this Uriel. But we are here to attend Abijah into the field of battle with Jeroboam king of Israel. I.
Commenting on 2 Chronicles 13:1-12
Yet Jeroboam the son of Nebat, the servant of Solomon the son of David, is risen up,.... Notwithstanding it was well known the kingdom was entailed on the posterity of David by an everlasting covenant; Abijah calls Jeroboam Solomon's servant, by way of great contempt, as Jarchi observes, he being the general receiver of his tax in the tribe of Ephraim, Kg1 11:28.
Ought ye not to know that the LORD God of Israel gave the kingdom over Israel to David for ever, [even] to him and to his sons by a covenant of salt? (e) Therefore whoever usurps it or takes it from that stock transgresses the ordinance of the Lord. Thus like a hypocrite he alleges the word of God for his advantage.