'Raiding' in the Bible

But a spirit empowered Amasai, the leader of the thirty warriors, and he said: "We are yours, O David! We support you, O son of Jesse! May you greatly prosper! May those who help you prosper! Indeed your God helps you!" So David accepted them and made them leaders of raiding bands.

They helped David fight against raiding bands, for all of them were warriors and leaders in the army.