1 Samuel 27:1-3

1And 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 will despair of me to seek me any more within all the limits of Israel, and I shall escape out of his hand.

2And David arose and passed over, he and the six hundred men that were with him, to Achish, the son of Maoch, king of Gath.

3And David abode with Achish at Gath, he and his men, every man with his household; David with his two wives, Ahinoam the Jizreelitess, and Abigail the Carmelitess, Nabal's wife.