David ... fled ... to Achish the king of Gath - which was one of the five principalities of the Philistines. In this place his person must have been known, and to venture into that country, he their greatest enemy, and with the sword of Goliath in his hand, would seem to have been a perilous experiment; but, doubtless, the protection he received implies that he had been directed by the divine oracle. Achish was generous (1Sa 27:6). He might wish to weaken the resources of Saul, and it was common in ancient times for great men to be harbored by neighboring princes.