Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[282] And by this means David unexpectedly escaped out of the danger he was in, and came to the Straits of Engedi; and when Saul had driven the Philistines out of the land, there came some messengers, who told him that David abode within the bounds of Engedi: so he took three thousand chosen men that were armed, and made haste to him; and when he was not far from those places, he saw a deep and hollow cave by the way-side; it was open to a great length and breadth, and there it was that David with his four hundred men were concealed. When therefore he had occasion to ease nature, he entered into it by himself alone; and being seen by one of David's companions, and he that saw him saying to him, that he had now, by God's providence, an opportunity of avenging himself of his adversary; and advising him to cut off his head, and so deliver himself out of that tedious, wandering condition, and the distress he was in; he rose up, and only cut off the skirt of that garment which Saul had on: but he soon repented of what he had done; and said it was not right to kill him that was his master, and one whom God had thought worthy of the kingdom; "for that although he were wickedly disposed towards us, yet does it not behoove me to be so disposed towards him." But when Saul had left the cave, David came near and cried out aloud, and desired Saul to hear him; whereupon the king turned his face back, and David, according to custom, fell down on his face before the king, and bowed to him; and said, "O king, thou oughtest not to hearken to wicked men, nor to such as forge calumnies, nor to gratify them so far as to believe what they say, nor to entertain suspicions of such as are your best friends, but to judge of the dispositions of all men by their actions; for calumny deludes men, but men's own actions are a clear demonstration of their kindness. Words indeed, in their own nature, may be either true or false, but men's actions expose their intentions nakedly to our view. By these, therefore it will be well for thee to believe me, as to my regard to thee and to thy house, and not to believe those that frame such accusations against me as never came into my mind, nor are possible to be executed, and do this further by pursuing after my life, and have no concern either day or night, but how to compass my life and to murder me, which thing I think thou dost unjustly prosecute; for how comes it about, that thou hast embraced this false opinion about me, as if I had a desire to kill thee? Or how canst thou escape the crime of impiety towards God, when thou wishest thou couldst kill, and deemest thine adversary, a man who had it in his power this day to avenge himself, and to punish thee, but would not do it? nor make use of such an opportunity, which, if it had fallen out to thee against me, thou hadst not let it slip, for when I cut off the skirt of thy garment, I could have done the same to thy head." So he showed him the piece of his garment, and thereby made him agree to what he said to be true; and added, "I, for certain, have abstained from taking a just revenge upon thee, yet art thou not ashamed to prosecute me with unjust hatred. ¹ May God do justice, and determine about each of our dispositions." - But Saul was amazed at the strange delivery he had received; and being greatly affected with the moderation and the disposition of the young man, he groaned; and when David had done the same, the king answered that he had the justest occasion to groan, "for thou hast been the author of good to me, as I have been the author of calamity to thee; and thou hast demonstrated this day, that thou possessest the righteousness of the ancients, who determined that men ought to save their enemies, though they caught them in a desert place. I am now persuaded that God reserves the kingdom for thee, and that thou wilt obtain the dominion over all the Hebrews. Give me then assurances upon oath, That thou wilt not root out my family, nor, out of remembrance of what evil I have done thee, destroy my posterity, but save and preserve my house." So David sware as he desired, and sent back Saul to his own kingdom; but he, and those that were with him, went up the Straits of Mastheroth.