1 Samuel 24:20 in the King James Version
And now, behold, I know well that thou shalt surely be king, and that the kingdom of Israel shall be established in thine hand.
Context
19 For if a man finds his enemy, will he let him go away unharmed? Therefore may the LORD reward you good for that which you have done to me today.
20 Now, behold, I know that you will surely be king, and that the kingdom of Israel will be established in your hand.
21 Swear now therefore to me by the LORD that you will not cut off my offspring after me, and that you will not destroy my name out of my father’s house.”