How did David twice prove to Saul that Saul”s life had been in his hands and had been spared?

How did David twice prove to Saul that Saul”s life had been in his hands and had been spared?
Answer:-By cutting off Saul”s robe in the cave of En-gedi, 1 Sam. 24:1-22; and by taking the spear and curse from beside Paul as he slept, 1 Sam. 26:5-25.