1 Samuel 19:2

But Jonathan, Saul's son, delighted much in David,.... In his company and conversation; he loved him with a love of complacency, and was constant and steadfast in it, and which was a kind providence to David; for by this means he came to the knowledge of Saul's designs upon him, and could the better guard against him:and Jonathan told David, saying, Saul my father seeketh to kill thee; to inform him of which was acting the part of a sincere and faithful friend:now therefore, I pray thee, take heed of thyself until the morning: it seems it was now evening when he informed him of it; and as he knew not what emissaries Saul might have out that night in quest of him, he advises him to take care of himself, and not expose himself to any danger, and to keep a strict guard about him; and in the morning he would try to conciliate his father to him, when he might hope, having slept upon it, that he would be in a better temper, and more disposed to hear what might be said to him:and abide in a secret [place], and hide thyself; he seems to suggest as if it was not safe for him to be in his own house, and in his own bedchamber that night, but that it was advisable to retire to some private place, where it might not be known or suspected that he was there.