2 Samuel 10:17 (BSB)

When this was reported to David, he gathered all Israel, crossed the Jordan, and went to Helam. Then the Arameans arrayed themselves against David and fought against him.

From 2 Samuel 10. Also in the ESV.

Commentary on 2 Samuel 10:17

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Samuel 10:15-19: Here is, 1. A new attempt of the Syrians to recover their lost honour and to check the progress of David's victorious arms. The forces that were lately dispersed rallied again, and gathered themselves together, Sa2 10:15. Even the baffled cause will make head as long as there is any life in it; the enemies of the Son of David do so, Matt, Sa2 22:34; Rev 19:19.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Samuel 10:17: And when it was told David,.... What preparations the Syrians were making to fight him, and where they were: he gathered all Israel together; all the fighting men in the country: and passed over Jordan, and came to Helam: which, according to Bunting (b), was twenty miles from Jerusalem.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on 2 Samuel 10:17: And when it was told David, he gathered all Israel together, and passed over Jordan, and came to Helam. And the Syrians set themselves in array against David, and fought with him. (f) Meaning, the greatest part.
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on 2 Samuel 10:17: David - gathered all Israel together - He thought that such a war required his own presence.