Besor

So David went, he and the six hundred men with him. They came to Vadi B'sor, where those who were to stay behind waited.

Then David continued in pursuit with four hundred men, while two hundred too exhausted to cross Vadi B'sor stayed behind.

David came to where the two hundred men were who had been too exhausted to follow him, whom they had let stay at Vadi B'sor. They came out to meet David and the people with him. When David approached them he greeted them.