1 Samuel 27:2

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

1 Samuel 21:10

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

1 Samuel 25:13

David said to his men, “Each of you gird on his sword.” So each man girded on his sword. And David also girded on his sword, and about four hundred men went up behind David while two hundred stayed with the baggage.

1 Samuel 30:8

David inquired of the Lord, saying, “Shall I pursue this band? Shall I overtake them?” And He said to him, “Pursue, for you will surely overtake them, and you will surely rescue all.”

1 Kings 2:39-40

But it came about at the end of three years, that two of the servants of Shimei ran away to Achish son of Maacah, king of Gath. And they told Shimei, saying, “Behold, your 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 of you gird on his sword.” So each man girded on his sword. And David also girded on his sword, and about four hundred men went up behind David while two hundred stayed with the baggage.
1 Samuel 30:8
David inquired of the Lord, saying, “Shall I pursue this band? Shall I overtake them?” And He said to him, “Pursue, for you will surely overtake them, and you will surely rescue all.”