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2 Samuel 15:23ESV·author unknown

And all the land wept aloud as all the people passed by, and the king crossed the brook Kidron, and all the people passed on toward the wilderness.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The notice brought to David of Absalom's rebellion, Sa2 15:13. The matter was bad enough, and yet it seems to have been made worse to him (as such things commonly are) than really it was; for he was told that the hearts of the men of Israel (that is, the generality of them, at least the leading men) were after Absalom.

Commenting on 2 Samuel 15:13-23

John Gill Reformed Baptist @doctorgill

And all the country wept with a loud voice,.... The people that came out of the country villages round about, upon the report of the king's leaving Jerusalem, because of his son's conspiracy against him; these wept when they saw him in the circumstances in which he was, obliged to fly from a rebellious son: and all the people passed over; the people that were...

Jamieson-Fausset-Brown Reformed @jfbcommentary

the brook Kidron--a winter torrent that flows through the valley between the city and the eastern side of the Mount of Olives.