1 Samuel 24:3
And he came to the sheepcotes by the way, where was a cave; and Saul went in to cover his feet: and David and his men remained in the sides of the cave.
Cross-references
Judges 3:24
Parallel
Judges 3:24 uses the same euphemism 'covering his feet' for relieving oneself, exactly matching Saul's action in the cave.
Psalm 57:1
Historical context
Psalm 57:1 is David's prayer for refuge 'in the shadow of your wings' — its superscription places it during this cave episode.
Psalm 142:1
Historical context
Psalm 142:1 is David's cry for mercy — its superscription says 'when he was in the cave', directly linking to this event.