So David went, he and the six hundred men who were with him, and came to the Brook Besor, where those stayed who were left behind.
1 Samuel 30:9
Surrounding context
30:8 So David inquired of the LORD, saying, "Shall I pursue this troop? Shall I overtake them?" And He answered him, "Pursue, for you shall surely overtake them and without fail recover all."
30:9 So David went, he and the six hundred men who were with him, and came to the Brook Besor, where those stayed who were left behind.
30:10 But David pursued, he and four hundred men; for two hundred stayed behind, who were so weary that they could not cross the Brook Besor.