Albert Barnes Commentary 1 Kings 14:1

"At that time Abijah the son of Jeroboam fell sick." — 1 Kings 14:1 (ASV)

At that time - This phrase connects the following narrative with Jeroboam’s persistence in his evil ways. The event described is the first judgment on him for his stubbornness, the beginning of his family line being cut off from the face of the earth.

Abijah - We see by this name that Jeroboam did not intend to abandon the worship of Yahweh, since its meaning is “Yahweh is my father,” or “Yahweh is my desire” (Job 34:36).