1 Chronicles 12:21

And they helped David against the band of the rovers
The Amalekites, who, while he was gone with the Philistines, had seized on Ziklag, and burnt it, and carried the women captive, with what spoil they could make; these coming to David thus opportunely, assisted him in his pursuit and defeat of them:

for they were all mighty men of valour, and were captains in the host;
or army of David.