Compair this piece of trash called the NIV with the KJV.
Who doesn't know what "cover his feet" means? He was asleep, not relieving himself!
NIV
1 Samuel 24
David Spares Saul's Life
1 After Saul returned from pursuing the Philistines, he was told, "David is in the Desert of En Gedi." 2 So Saul took three thousand chosen men from all Israel and set out to look for David and his men near the Crags of the Wild Goats.
3 He came to the sheep pens along the way; a cave was there, and Saul went in to relieve himself. David and his men were far back in the cave. 4 The men said, "This is the day the LORD spoke of when he said to you, 'I will give your enemy into your hands for you to deal with as you wish.' " Then David crept up unnoticed and cut off a corner of Saul's robe.
5 Afterward, David was conscience-stricken for having cut off a corner of his robe. 6 He said to his men, "The LORD forbid that I should do such a thing to my master, the LORD's anointed, or lift my hand against him; for he is the anointed of the LORD ." 7 With these words David rebuked his men and did not allow them to attack Saul. And Saul left the cave and went his way.
8 Then David went out of the cave and called out to Saul, "My lord the king!" When Saul looked behind him, David bowed down and prostrated himself with his face to the ground.
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KJV
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 Engedi.
2 Then Saul took three thousand chosen men out of all Israel, and went to seek David and his men upon the rocks of the wild goats.
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.
4 And the men of David said unto him, Behold the day of which the LORD said unto thee, Behold, I will deliver thine enemy into thine hand, that thou mayest do to him as it shall seem good unto thee. Then David arose, and cut off the skirt of Saul's robe privily.
5 And it came to pass afterward, that David's heart smote him, because he had cut off Saul's skirt.
6 And he said unto his men, The LORD forbid that I should do this thing unto my master, the LORD's anointed, to stretch forth mine hand against him, seeing he is the anointed of the LORD.
7 So David stayed his servants with these words, and suffered them not to rise against Saul. But Saul rose up out of the cave, and went on his way.
8 David also arose afterward, and went out of the cave, and cried after Saul, saying, My lord the king. And when Saul looked behind him, David stooped with his face to the earth, and bowed himself.