1 Samuel 19:1-7

And Saul spake to Jonathan his son, and to all his servants, that they should kill David. But Jonathan Saul's son delighted much in David: and Jonathan told David, saying, Saul my father seeketh to kill thee: now therefore, I pray thee, take heed to thyself until the morning, and abide in a secret place, and hide thyself: and I will go out and stand beside my father in the field where thou art, and I will commune with my father of thee; and what I see, that I will tell thee. And Jonathan spake good of David unto Saul his father, and said unto him, Let not the king sin against his servant, against David; because he hath not sinned against thee, and because his works have been to thee-ward very good: for he did put his life in his hand, and slew the Philistine, and the LORD wrought a great salvation for all Israel: thou sawest it, and didst rejoice: wherefore then wilt thou sin against innocent blood, to slay David without a cause? And Saul hearkened unto the voice of Jonathan: and Saul sware, As the LORD liveth, he shall not be slain. And Jonathan called David, and Jonathan shewed him all those things. And Jonathan brought David to Saul, and he was in his presence, as in times past.