1 Samuel 28:1

In those days, the Philistines gathered their armies together for warfare, to fight with Israel. Achish said to David, “Know assuredly that you will go out with me in the army, you and your men.”

And it came to pass in those days, that the Philistines gathered their armies together for warfare, to fight with Israel. And Achish said unto David, Know thou assuredly, that thou shalt go out with me to battle, thou and thy men.