1 Samuel 21:10-15
And David arose and fled that day for fear of Saul, and went to Achish the king of Gath.
Nave's Topical Index—AKJV

1 Samuel 27:1
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.
Nave's Topical Index—AKJV

1 Samuel 28:1,2
And it came to pass in those days, that the Philistines gathered their armies together for warfare, to fight with Israel. And Achish said to David, Know you assuredly, that you shall go out with me to battle, you and your men.
Nave's Topical Index—AKJV

1 Samuel 29:1
Now the Philistines gathered together all their armies to Aphek: and the Israelites pitched by a fountain which is in Jezreel.
Nave's Topical Index—AKJV

1 Kings 2:39,40
And it came to pass at the end of three years, that two of the servants of Shimei ran away to Achish son of Maachah king of Gath. And they told Shimei, saying, Behold, your servants be in Gath.
Nave's Topical Index—AKJV