King James Version
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.English Standard Version
In those days the Philistines gathered their forces for war, to fight against Israel. And Achish said to David, "Understand that you and your men are to go out with me in the army."New International Version
In those days the Philistines gathered their forces to fight against Israel. Achish said to David, "You must understand that you and your men will accompany me in the army."