What Spurgeon wrote was imaginary covenants that each member of the Trinity might have taken before effecting the Redemption of God's people. Each statement is so thoroughly Bible-saturated and compelling that I wanted to post them. Please remember these are Spurgeon's words and, though obviously drawing on Biblical truth, we can't assign them the same authority.
Spurgeon first imagined the Father saying,
"I, the Most High Jehovah, do hereby give unto my only begotten and well-beloved Son, a people countless beyond the number of the stars who shall be by Him washed from sin, by Him preserved, and kept, and led, and by Him, at last, presented before my throne, without spot, or wrinkle, or any such thing. I covenant by oath and sware by myself, because I can sware by no greater, that those whom I now give to Christ shall be forever the objects of my eternal love. Them will I forgive through the merit of the blood, to these will I give a perfect righteousness; these will I adopt and make my sons and daughters, and these shall reign with me through Christ eternally!"