1 Samuel 27:2

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

1 Samuel 21:10

And David arose, and fled that day for fear of Saul, and went to Achish the king of Gath.

1 Samuel 25:13

And David said to his men, Gird ye on every man his sword. And they girded on every man his sword, and David also girded on his sword. And there went up after David about four hundred men, and two hundred abode by the baggage.

1 Samuel 30:8

And David inquired of LORD, saying, If I pursue after this troop, shall I overtake them? And he answered him, Pursue, for thou shall surely overtake [them], and shall without fail recover [all].

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 Maacah, king of Gath. And they told Shimei, saying, Behold, thy 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
And David said to his men, Gird ye on every man his sword. And they girded on every man his sword, and David also girded on his sword. And there went up after David about four hundred men, and two hundred abode by the baggage.
1 Samuel 30:8
And David inquired of LORD, saying, If I pursue after this troop, shall I overtake them? And he answered him, Pursue, for thou shall surely overtake [them], and shall without fail recover [all].