Psalms 40:7

Then said I, Lo, I come: in the volume of the book [it is] written of me,

Ver. 7. Then said I, Lo, I come] Christ became obedient even to the death, yea, that of the cross, Philippians 2:8. Christ's people also are a willing people, Psalms 110:3, their obedience is prompt and present, ready and speedy, without delays and consults, Psalms 119:60, without capitulation and security, Isaiah 56:6 .

In the volume of the book] In libro plicatili, in thy law, which was anciently (and is still this day among the Jews) written in paper or parchment rolled up; because it will last longer rolled than folded.

It is written of me] Of Christ, in many places; for he is both author, object, matter, and mark of both Testaments. Of David also, and all God's people, doth the law speak with fruit and efficacy; and they do use to read their own names, written, as it were, in every precept, promise, threatening. Look how men read the statute book of the land, as holding themselves highly concerned therein: so here.