1 Samuel 19:2

But Jonathan, Saul's son, delighted much in David, his great love for his friend was unchanged; and Jonathan told David, saying, Saul, my father, seeketh to kill thee, his loyalty for his friend urged him to warn David, even at the risk of offending his father. Now, therefore, I pray thee, take heed to thyself until the morning, and abide in a secret place, and hide thyself;