1 Samuel 22:2-6

And every one that was in distress, and every one that was in debt, and every one that was discontented, gathered themselves unto him; and he became a captain over them: and there were with him about four hundred men.

And David went thence to Mizpeh of Moab: and he said unto the king of Moab, Let my father and my mother, I pray thee, come forth, and be with you, till I know what God will do for me.

And he brought them before the king of Moab: and they dwelt with him all the while that David was in the hold.

And the prophet Gad said unto David, Abide not in the hold; depart, and get thee into the land of Judah. Then David departed, and came into the forest of Hareth.

When Saul heard that David was discovered, and the men that were with him, (now Saul abode in Gibeah under a tree in Ramah, having his spear in his hand, and all his servants were standing about him;)