Charles Ellicott Commentary 2 Samuel 19:15

"So the king returned, and came to the Jordan. And Judah came to Gilgal, to go to meet the king, to bring the king over the Jordan." — 2 Samuel 19:15 (ASV)

Judah came to Gilgal. —The two parties met at the Jordan, David coming from Mahanaim to the eastern side of the ford, near Jericho, and the representatives of the tribe of Judah to Gilgal on the opposite bank.