1 Samuel 27:6

And David said in his heart, I shall now perish one day by the hand of Saul: there is nothing better for me than that I should speedily escape into the land of the Philistines; and Saul shall despair of me, to seek me any more in any coast of Israel: so shall I escape out of his hand.

And David arose, and he passed over with the six hundred men that were with him unto Achish, the son of Maoch, king of Gath.

And David dwelt with Achish at Gath, he and his men, every man with his household, even David with his two wives, Ahinoam the Jezreelitess, and Abigail the Carmelitess, Nabal's wife.

And it was told Saul that David was fled to Gath: and he sought no more again for him.