Salvation is of the LORD. -Jonah 2:9

No one has helped to provide salvation; God has done it all Himself. The banquet of mercy is served up by one Host; that Host is He to whom the cattle on a thousand hills belong. But none have contributed any dainties to that royal banquet; He hath done it all Himself… The royal bath of mercy, wherein black souls are washed, was filled from the veins of Jesus; not a drop was contributed by any other being. He died upon the cross, and as an expiator He died alone. No blood of martyrs mingled with that stream; no blood of noble confessors and of heroes of the cross entered into the river of atonement that is filled from the veins of Christ, and from nowhere else beside. He hath done it wholly. Atonement is the unaided work of Jesus. On yonder cross I see the Man who “trod the winepress alone;” in yonder garden I see the solitary conqueror who came to the fight single-handed, whose own arm brought salvation, and whose omnipotence sustained Him. “Salvation is of the Lord,” as to its provisions; Jehovah-Father, Son, and Spirit-hath provided everything.

“Salvation of the Lord alone;
Grace is a shoreless sea.”

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0131.cfm