Exodus 8:9

Glory over me: as I have gloried over thee in laying first my commands, and then my plagues upon thee, so now lay thy commands upon me for the time of my praying; and if I do not what thou requirest, I am content thou shouldst insult over me, punish me. Or, glory, or boast thyself of, or concerning me, as one that thy God's power can do that for thee which all thy magicians cannot, of whom therefore thou now seest thou canst not glory nor boast, as thou hast hitherto done. When shall I entreat for thee? Appoint me what time thou pleasest. Hereby he knew that the hand and glory of God would be more conspicuous in it. And this was no presumption in Moses, because he had a large commission, Exodus 7:1; and also had particular direction from God in all that he said or did in these matters.