1 Chronicles 11:15

Now three of the thirty captains went down to the rock to David, into the cave of Adullam; and the host of the Philistines encamped in the valley of Rephaim.

Cross-reference

1 Chronicles 12:4 lists other mighty men, expanding the roster of David’s warriors from the same period.

1 Samuel 22:1 describes David at the same cave of Adullam where his family gathered.

2 Samuel 23:13-39 is the parallel account of the three mighty men coming to David at Adullam.

1 Samuel 22:2 describes David’s followers at the cave of Adullam, the same location where the three mighty men came to him.

2 Samuel 5:22 records another Philistine encampment in the same Valley of Rephaim, showing the recurring conflict there.