He said to him, Don't be afraid; for the hand of Saul my father shall not find you; and you shall be king over Israel, and I shall be next to you; and that also Saul my father knows.
and that also Saul my father knoweth; having knowledge of the anointing of David by Samuel; or he might, and did conclude this from various circumstances, that David was his neighbour Samuel had told him of, God had given his kingdom to, 1 Samuel 15:28.