Matthew Henry on 2 Samuel 17:22–end
Here is, I. The transporting of David and his forces over Jordan, pursuant to the advice he had received from his friends at Jerusalem, Sa2 17:22. He, and all that were with him, went over in the night, whether in ferryboats, which probably always plied there, or through the fords, does not appear. But special notice is taken of this, that there lacked not one of them: none deserted him, though his distress was great, none staid behind sick or weary, nor were any lost or cast away in passing the river. Herein some make him a type of the Messiah, who said, in a difficult day, Of all that thou hast given me have I lost none. Having got over Jordan, he marched many miles forward to Mahanaim, a…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 17:25
Amasa--By the genealogy it appears that this captain stood in the same relation to David as Joab, both being his nephews. Of course, Amasa was Absalom's cousin, and though himself an Israelite, his father was an Ishmaelite (Ch1 2:17).
Nahash--is thought by some to be another name of Jesse, or according to others, the name of Jesse's wife.
Adam Clarke on 2 Samuel 17:25
Amasa captain of the host - From the account in this verse, it appears that Joab and Amasa were sisters' children, and both nephews to David.
John Gill on 2 Samuel 17:26
So Israel and Absalom pitched in the land of Gilead. Which belonged to the tribes of Reuben and Gad, and the half tribe of Manasseh; here the Israelites that were with Absalom encamped, in order to give battle to David and his men.
Keil & Delitzsch on 2 Samuel 17:25-26
Absalom had made Amasa captain over his army instead of Joab, who had remained true to David, and had gone with his king to Mahanaim. Amasa was the son of a man named Jithra, היּשׂראלי, who had gone in to (i.e., had seduced) Abigail, the daughter of Nahash and sister of Zeruiah, Joab's mother. He was therefore an illegitimate cousin of Joab. The description given of Jithra as ישׂראלי is very striking, since there was no reason whatever why it should be stated that Amasa's father was an Israelite. The Seventy have therefore given ὁ Ἰεζραηλίτης, i.e., sprung from Jezreel, where David's wife Ahinoam came from (Sa1 27:3); but they have done so apparently from mere conjecture. The true reading…
