This great change is not to be ascribed to any true repentance for his sin against David, or any better affection which he now had to him; but merely to his own worldly interest, because he was convinced by Jonathan's discourse that he could not kill him without great inconvenience and shame to himself.
Related Commentaries of 1 Samuel 19:6
1 Samuel 19:6
6 And Saul hearkened unto the voice of Jonathan: and Saul sware, As the LORD liveth, he shall not be slain.