Matthew Poole and continuators on 1 Samuel 23:17

17 And 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 .

Which he gathered either from David's Generosity, Ingenuity, and true Friendship to him; or from some promise made to him by David concerning it. Or, the meaning of the words next unto thee, may be as much as to say, I shall be under thee, after thee, or inferior to thee, as the Phrase tibi secundus oft signifies. So that the whole imports thus much; I do not look to be King my self (as by my Birth I might expect), but that thou shalt be King (God having so appointed) and I but in a Secondary place inferior to thee.

By strong and well-grounded conjectures, as hath been noted.

Marginal references: Chap. 24. 20.