1 Chronicles 12:21

Against the band of the rovers, i.e. against the Amalekites who had taken and burned Ziklag, whom David and his six hundred men were now pursuing, whom these accompanied in that expedition. Or, with a band or troop of soldiers, which they brought along with them to David's assistance. They were all mighty men of valour; therefore they readily came to David's help. Were captains in the host; therefore they brought others along with them.