Adam Clarke on Psalms 119:160

Thy word is true from the beginning - ראש rosh, the head or beginning of thy word, is true. Does he refer to the first word in the Book of Genesis, בראשית bereshith, "in the beginning?" The learned reader knows that ראש rash, or raash, is the root in that word. Every word thou hast spoken from the first in Bereshith (Genesis) to the end of the law and prophets, and all thou wilt yet speak, as flowing from the fountain of truth, must be true; and all shall have in due time, their fulfllment. And all these, thy words endure for ever. They are true, and ever will be true.