1 Samuel 27:2

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

1 Samuel 21:10

And David arose and fled the same day from the presence of Saul, and went to Achish the king of Gath.

1 Samuel 25:13

Then David said unto his men, "Gird every man his sword about him." And they girded every man his sword on, and David thereto girded on his sword. And there followed David upon a four hundred men, and two hundred abode by the stuff.

1 Samuel 30:8

And David asked the LORD, saying, "Shall I follow after this company? And shall I overtake them?" And he said to him, "Follow, for thou shalt overtake them and recover the prey."

1 Kings 2:39-40

And it chanced, at the end of three years, that two of the servants of Shimei ran away unto Achish, son of Maacah, king of Gath. And one told Shimei, saying, "See, thy servants be in Gath."

Treasury of Scripture Knowledge

Summary

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.

Bible References

The six

1 Samuel 25:13
Then David said unto his men, "Gird every man his sword about him." And they girded every man his sword on, and David thereto girded on his sword. And there followed David upon a four hundred men, and two hundred abode by the stuff.
1 Samuel 30:8
And David asked the LORD, saying, "Shall I follow after this company? And shall I overtake them?" And he said to him, "Follow, for thou shalt overtake them and recover the prey."