When the Philistines were at war again with Israel, David and his servants with him went down and fought against the Philistines; and David grew faint.
2 Samuel 21:15
Surrounding context
21:14 They buried the bones of Saul and Jonathan his son in the country of Benjamin in Zelah, in the tomb of Kish his father. So they performed all that the king commanded. And after that God heeded the prayer for the land.
21:15 When the Philistines were at war again with Israel, David and his servants with him went down and fought against the Philistines; and David grew faint.
21:16 Then Ishbi-Benob, who was one of the sons of the giant, the weight of whose bronze spear was three hundred shekels, who was bearing a new sword, thought he could kill David.