1 Samuel 23:14-18

14And David abode in the wilderness in the strong holds, and remained in the hill country in the wilderness of Ziph. And Saul sought him every day, but God delivered him not into his hand.

15And David saw that Saul was come out to seek his life: and David was in the wilderness of Ziph in the wood.

16And Jonathan Saul’s son arose, and went to David into the wood, and strengthened his hand in God.

17And he said unto him, Fear not: for the hand of Saul my father shall not find thee; and thou shalt be king over Israel, and I shall be next unto thee; and that also Saul my father knoweth.

18And they two made a covenant before the LORD: and David abode in the wood, and Jonathan went to his house.