I Samuel 30:3-4, 6, 9-10

So David and his men came to the city, and there it was, burned with fire; and their wives, their sons, and their daughters had been taken captive. Then David and the people who were with him lifted up their voices and wept, until they had no more power to weep.

Now David was greatly distressed, for the people spoke of stoning him, because the soul of all the people was grieved, every man for his sons and his daughters. But David strengthened himself in the LORD his God.

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. 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.