1 Corinthians 3:23

And ye are Christ's
This is the ground and foundation of all things being theirs, and shows in what way they come by them, and what gives them their claim and property: they are Christ's, he has an interest in them, and they in him; they are his, not only by creation, as all men are, but by the Father's special gift of them to him, as his spouse and bride, his children, his sheep, his portion, and his jewels; they are his through the purchase of his own blood, and by a voluntary surrender of themselves unto him, under the influence of his Spirit and grace; they are his by their profession of him; they avouch themselves to be the Lord's and call themselves by his name; and they are his by his possession of them, and dwelling in their hearts by faith; and all they have are his. Their worst things are his; their sins are accounted to him, and laid on him by imputation, and have been bore and done away by him: their griefs and sorrows are his, their reproaches his, and their afflictions and sufferings his. Their best things are his; their temporal mercies come from him, and through him; and all their spiritual blessings, they are blessed with in him; and all the good things done by them are done in his strength, by the assistance of his Spirit, and in virtue of his grace.

And Christ is God's;
he is his Son, his own, his only begotten and well beloved Son, as he is a divine person; and as man he is his creature, made by him, and inferior to him; he is the head of him, as the man is of the woman; and as Mediator, he is his righteous servant, whom he has chosen, called, brought forth, upheld, and in whom he is glorified: so that, upon the whole, the saints should not glory in men, though ever so great and good, but in God, and in Christ, as of God, made unto them wisdom, righteousness, sanctification, and redemption.