It happened, when Saul was returned from following the Philistines, that it was told him, saying, Behold, David is in the wilderness of En Gedi.
"There was a cave, and Saul went in to relieve himself"  (1 Samuel 24:3), literally, " ... to cover his feet."  The last clause here should be understood in the same sense as  Judges 3:24.  The expression is a euphemism for "using the bathroom," or "going to a restroom."