1 Samuel 23-24
Saul continued to persue David from Keilah to Horesh to Ziph and finally to the wilderness of Engedi. Saul went into a cave and was in a vulnerable situation where David had the opportunity to kill him, but David restrained his men and spared Saul's life saying, "The Lord forbid that I should do this to my lord the king and attack the Lord's annointed one, for the Lord himself has chosen him." Saul then began to cry and said, "you are a better man that I am, for you have repaid me good for evil... you have been amazingly kind to me today... may the Lord reward you well for the kindness you have shown me and now I realize that you are surely going to be king, and that the kingdom of Israel will flourish under your rule".