Now in those days the Philistines gathered their forces for warfare against Israel. So Achish said to David, “You must understand that you and your men are to go out to battle with me.”
Jewish Publication Society of America Version (JPS1917) - 1 Samuel 28:1 >And it came to pass in those days, that the Philistines gathered their hosts together for warfare, to fight with Israel. And Achish said unto David: 'Know thou assuredly, that thou shalt go out with me in the host, thou and thy men.'