Matthew Henry on 2 Chronicles 13:13–end
We do not find that Jeroboam offered to make any answer at all to Abijah's speech. Though it was much to the purpose, he resolved not to heed it, and therefore he heard it as though he heard it not. He came to fight, not to dispute. The longest sword, he thought, would determine the matter, not the better cause. Let us therefore see the issue, whether right and religion carried the day or no.
I. Jeroboam, who trusted to his politics, was beaten. He was so far from fair reasoning that he was not for fair fighting. We may suppose that he felt a sovereign contempt for Abijah's harangue. "One stratagem," thinks he, "is worth twenty such speeches; we will soon give him an answer to all his argume…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Chronicles 13:20
Neither did Jeroboam recover strength again in the days of Abijah--The disastrous action at Zemaraim, which caused the loss of the flower and chivalry of his army, broke his spirits and crippled his power.
the Lord struck him, and he died--that is, Jeroboam. He lived, indeed, two years after the death of Abijah (Kg1 14:20; Kg1 15:9). But he had been threatened with great calamities upon himself and his house, and it is apparently to the execution of these threatenings, which issued in his death, that an anticipatory reference is here made.
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Adam Clarke on 2 Chronicles 13:20
The Lord struck him, and he died - Who died? Abijah or Jeroboam? Some think it was Jeroboam; some, that it was Abijah. Both rabbins and Christians are divided on this point; nor is it yet settled. The prevailing opinion is that Jeroboam is meant, who was struck then with that disease of which he died about two years after; for he did not die till two years after Abijah: see Kg1 14:20; Kg1 15:9. It seems as if Jeroboam was meant, not Abijah.
John Gill on 2 Chronicles 13:20
Neither did Jeroboam recover strength again in the days of Abijah,.... So as to bring an army into the field against him, and fight him:
and the Lord struck him; by some Jewish writers (a), this is interpreted of Abijah; and the reason of his being stricken, they say, was because he did not destroy the calf when he took Bethel; but it is best to understand it of Jeroboam, since Abijah is afterwards said to wax mighty:
and he died; not immediately, for he lived two years after Abijah, 1 Kings 14:20, but continued under a lingering disease he was smitten with, and which issued in his death.
(a) Bereshit Rabba, sect. 65. fol. 58. 8. Seder Olam Rabba, c. 16.