Psalms 40:7-8

⁷then I said, Lo! I come. In the head of the book it is written of me, (and so I said, Behold! I am here. From the beginning, the Book (of thy Law) was written for me,)

⁸that I should do thy will; my God, I would/I desired also to do (it); and thy law in the midst of mine heart. (so that I would do thy will; my God, I desire to do it; and thy Law is there in the midst of my heart.)