Had written — Had given me his charge written in a book or paper, as the manner was in judicial proceedings. This shews that Job did not live, before letters were in use. And undoubtedly the first letters were those wrote on the two tables, by the finger of God. He wishes, his friends, who charged him with hypocrisy, would draw up the charge in writing.
Related Commentaries of Job 31:35
Job 31:35
35 Oh that one would hear me! behold, my desire is, that the Almighty would answer me, and that mine adversary had written a book.