1 Samuel 19:1

“And Saul spake to Jonathan his son, etc.] Who was heir to his crown; and though he knew he loved David, and was in strict friendship with him, yet he might hope, that as his succession to the kingdom was in danger, as he thought, and that David was his rival in it, his mind would be alienated from him; and that he would listen rather to a father than a friend, and would see where his true interest lay, and abandon David, yea, seek his ruin, which Saul was intent upon and to all his servants; who yet pretended to love David, and as he himself said they did, and some of them might; with these he might rather hope to succeed, as they were attached to him, and might be secretly enemies of David,…”

“JONATHAN DISCLOSES HIS FATHER'S PURPOSE TO KILL DAVID. (Sa1 19:1-7) Saul spake to Jonathan his son, and to all his servants, that they should kill David--The murderous design he had secretly cherished he now reveals to a few of his intimate friends. Jonathan was among the number. He prudently said nothing at the time, but secretly apprised David of his danger; and waiting till the morning, when his father's excited temper would be cooled, he stationed his friend in a place of concealment, where, overhearing the conversation, he might learn how matters really stood and take immediate flight, if necessary.”

“And Saul: Saul's enmity now burst forth, in the avowed purpose of putting David to death; and nothing less than the especial interposition of Providence could have saved David's life, when every officer about the king's person, and every soldier, had positive orders to dispatch him. Sa1 18:8, Sa1 18:9; Pro 27:4; Ecc 9:3; Jer 9:3; Ti2 3:13 1 Kings (1 Samuel) 19:2”

“Jonathan warded off the first outbreak of deadly enmity on the part of Saul towards David. When Saul spoke to his son Jonathan and all his servants about his intention to kill David (את־דּוד להמית, i.e., not that they should kill David, but "that he intended to kill him"), Jonathan reported this to David, because he was greatly attached to him, and gave him this advice: "Take heed to thyself in the morning; keep thyself in a secret place, and hide thyself. I will go out and stand beside my father in the field where thou art, and I will talk to my father about thee (בּ דּבּר, as in Deu 6:7; Psa 87:3, etc., to talk of or about a person), and see what (sc., he will say), and show it to thee."…”