2 And David arose and passed over, he and the six hundred men that were with him, to Achish, the son of Maoch, king of Gath. 3 And 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. 4 And it was told Saul that David had fled to Gath; and he sought no more for him.
Matthew Henry's Commentary on 1 Samuel 27:2-4
Commentary on 1 Samuel 27:1-7
(Read 1 Samuel 27:1-7)
Unbelief is a sin that easily besets even good men, when without are fightings, and within are fears; and it is a hard matter to get over them. Lord, increase our faith! We may blush to think that the word of a Philistine should go further than the word of an Israelite, and that the city of Gath should be a place of refuge for a good man, when the cities of Israel refuse him a safe abode. David gained a comfortable settlement, not only at a distance from Gath, but bordering upon Israel, where he might keep up a correspondence with his own countrymen.