Moses
Psalm 40:7BSB·traditional attribution

Then I said, “Here I am, I have come—it is written about me in the scroll:

John Calvin Reformed @genevareformer

PSALM 40 David, being delivered from some great danger, and it may be, not from one only, but from many, extols very highly the grace of God, and by means of this, his soul is filled with admiration of the providence of God, which extends itself to the whole human race.

Commenting on Psalm 40:1-17

C.H. Spurgeon Reformed Baptist @princeofpreachers

Then said I. That is to say, when it was clearly seen that man's misery could not be remedied by sacrifices and offerings. It being certain that the mere images of atonement, and the bare symbols of propitiation were of no avail, the Lord Jesus, in propria persona, intervened.

Matthew Henry Presbyterian @wholebiblehenry

The psalmist, being struck with amazement at the wonderful works that God had done for his people, is strangely carried out here to foretel that work of wonder which excels all the rest and is the foundation and fountain of all, that of our redemption by our Lord Jesus Christ.

Commenting on Psalm 40:6-10