Matthew Henry on 2 Samuel 20:4-13
We have here Amasa's fall just as he began to rise. He was nephew to David (Sa2 17:25), had been Absalom's general and commander-in-chief of his rebellious army, but, that being routed, he came over into David's interest, upon a promise that he should be general of his forces instead of Joab. Sheba's rebellion gives David an occasion to fulfil his promise sooner than he could wish, but Joab's envy and emulation rendered its fulfillment of ill consequence both to him and David.
I. Amasa has a commission to raise forces for the suppressing of Sheba's rebellion, and is ordered to raise them with all possible expedition, Sa2 20:4. It seems, the men of Judah, though forward to attend the king's t…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 20:4
Then said the king to Amasa, Assemble me the men of Judah within three days--Amasa is now installed in the command which David had promised him. The revolt of the ten tribes, probably, hastened the public declaration of this appointment, which he hoped would be popular with them, and Amasa was ordered within three days to levy a force from Judah sufficient to put down the insurrection. The appointment was a blunder, and the king soon perceived his error. The specified time passed, but Amasa could not muster the men. Dreading the loss of time, the king gave the commission to Abishai, and not to Joab--a new affront, which, no doubt, wounded the pride of the stern and haughty old general. But h…
Read the whole note in the consoleAdam Clarke on 2 Samuel 20:4
Then said the king to Amasa - Thus he invests him with the command of the army, and sends him to collect the men of Judah, and to come back to receive his orders in relation to Sheba, in three days. It appears that Amasa found more difficulty in collecting his country-men than was at first supposed; and this detaining him beyond the three days, David, fearing that Sheba's rebellion would get head, sent Abishai, who it appears was accompanied by Joab, to pursue after Sheba.
Amasa, it seems, got up with them at Gibeon, Sa2 20:8, where he was treacherously murdered by the execrable Joab.