2 Samuel 17:11 (BSB)

Instead, I advise that all Israel from Dan to Beersheba—a multitude like the sand on the seashore—be gathered to you, and that you yourself lead them into battle.

From 2 Samuel 17. Also in the ESV.

Commentary on 2 Samuel 17:11

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Samuel 17:1-14: Absalom is now in peaceable possession of Jerusalem; the palace-royal is his own, as are the thrones of judgment, even the thrones of the house of David. His good father reigned in Hebron, and only over the tribe of Judah, above seven years, and was not hasty to destroy his rival; his government was built upon a divine promise, the performance of which he was...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Samuel 17:11: So shall we come upon him in some place where he shall be found,.... For such a numerous army, which would be spread abroad, could not well fail of finding him out, let him be in what lurking place he would; whereas he might lie concealed, and escape so small a number as twelve thousand men: and we will light upon him as the dew...
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on 2 Samuel 17:11: 2Sa 17:11 “Yea (כּי, profecto), I advise: let all Israel be gathered round thee from Dan to Beersheba (see at Jdg 20:1), numerous as the sand by the sea; and thou thyself go into the war.” פניך, thy person, i.e., thou thyself be marching. The plural הלכים is used because of פניך. For בּ הלך, to enter into anything, see 1Ki 19:4; Isa 45:16; Isa 46:2.