Adam Clarke's Bible Commentary Verse 8. If they will not believe-the voice of the first sign, &c.] Probably intimating that some would be more difficult to be persuaded than others: some would yield to the evidence of the first miracle; others would hesitate till they had seen the second; and others would not believe till they had seen the water of the Nile turned into blood, when poured upon the dry land; Exodus iv. 9.
Matthew Henry Commentary
Verses 1-9 - Moses objects, that the people would not take his word, unless he showed them some sign. God gives him power to work miracles. But thos who are now employed to deliver God's messages to men, need not the power to work miracles: their character and their doctrines are to be tried by that word of God to which they appeal. These miracle especially referred to the miracles of the Lord Jesus Christ. I belonged to Him only, to cast the power of the devil out of the soul and to heal the soul of the leprosy of sin; and so it was for Him firs to cast the devil out of the body, and to heal the leprosy of the body.
Original Hebrew והיה1961 אם518 לא3808 יאמינו539 לך ולא3808 ישׁמעו8085 לקל6963 האת226 הראשׁון7223 והאמינו539 לקל6963 האת226 האחרון׃314