1 Chronicles 11:13-17

He was with David at Pas-dammim, and there the Philistines were gathered together to battle, where was a parcel of ground full of barley; and the people fled from before the Philistines.

And they set themselves in the midst of that parcel, and delivered it, and slew the Philistines; and the LORD saved them by a great deliverance.

Now three of the thirty captains went down to the rock to David, into the cave of Adullam; and the host of the Philistines encamped in the valley of Rephaim.

And David was then in the hold, and the Philistines’ garrison was then at Beth-lehem.

And David longed, and said, Oh that one would give me drink of the water of the well of Beth-lehem, that is at the gate!