Psalms 89:3

I have made a covenant with my chosen,.... Not with Abraham, as the Targum expresses it: but with David, as in the following clause; not David, literally understood, though he was chosen of the Lord to be his servant, and a covenant was made with him, and a promise made to him of the perpetuity of his throne and kingdom in his family, Ps 78:70 but mystical David, the Messiah, David's son and antitype; after, on this account, called David in Scripture, Eze 34:23 and who is the Lord's "chosen" One, foreordained to be the Redeemer of lost sinners, chosen to be the Mediator between God and them, to be the head of the church, and Saviour of the body; and his human nature was chosen to the grace of union to the Son of God, Ps 89:19, hence he is called God's elect, Isa 43:1 and with him the covenant of grace was made from all eternity, and all the blessings and promises of it were put into his hands; he is the Mediator, surety, and messenger of it, and by his blood it is ratified and confirmed: the Septuagint render it, in the plural number, "with mine elect ones"; and it is a truth, that the covenant of grace is made with all the elect, considered in Christ, and is made with them as such, and not as believers, converted persons, &c.