John Gill Commentary 1 Samuel 24:1

"And it came to pass, when Saul was returned from following the Philistines, that it was told him, saying, Behold, David is in the wilderness of En-gedi." — 1 Samuel 24:1 (ASV)

And it came to pass, when Saul was returned from following the
Philistines
Having, as it should seem, got the victory over them, and driven them out of his country, and pursued them to their own:

that it was told him, saying, behold, David [is] in the wilderness of
Engedi ;
in the strong holds of it, the high rocks and mountains in it, (1 Samuel 23:29) .