1 Samuel 22:5

The Prophet Gad said unto David We read nothing of this prophet before; and it is likely God raised him up at this time, on purpose for the support and direction of David. Abide not in the hold That is, do not shut up thyself here; for he did not merely intend any particular strong place, where David might now be, but in general all those places where he kept himself concealed. Get thee into the land of Judah As one that confides in God, and in the uprightness of his intentions. Go, show thyself to the people, that thou mayest publicly put in thy claim to the kingdom after Saul's death; and that thy friends may be invited and encouraged to appear in thy behalf. Hereby also God would exercise David's faith, wisdom, and courage, and so prepare him for the kingdom.