1 Samuel 27:2

So David and the six hundred men who were with him arose and crossed over to Achish the son of Maoch, king of Gath.

1 Samuel 21:10

Then David arose and fled from Saul that day, and went to Achish king of Gath.

1 Samuel 25:13

David said to his men, “Each man put on your sword.” So each man put on his sword. David also put on his sword, and about four hundred men went up behind David while two hundred stayed back with the provisions and supplies.

1 Samuel 30:8

David inquired of the Lord, saying, “Shall I pursue this band [of raiders]? Will I overtake them?” And He answered him, “Pursue, for you will certainly overtake them, and you will certainly rescue [the captives].”

1 Kings 2:39-40

But it happened after three years, that two of Shimei’s servants ran away to Achish the son of Maacah, the king of Gath. And Shimei was told, “Behold, your [runaway] servants are 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
David said to his men, “Each man put on your sword.” So each man put on his sword. David also put on his sword, and about four hundred men went up behind David while two hundred stayed back with the provisions and supplies.
1 Samuel 30:8
David inquired of the Lord, saying, “Shall I pursue this band [of raiders]? Will I overtake them?” And He answered him, “Pursue, for you will certainly overtake them, and you will certainly rescue [the captives].”