Shemot 4:8-10

Orthodox Jewish Bible

⁸ And it shall come to pass, if they will not believe thee, neither pay heed to the voice of haOt Harishon, that they will believe the voice of haOt haAcharon.

⁹ And it shall come to pass, if they will not believe also these two otot, neither pay heed unto thy voice, that thou shalt take of the mayim of the Nile, and pour it upon the yabashah (dry land); and the mayim which thou takest out of the Nile shall become dahm upon the yabashah.

¹⁰ And Moshe said unto Hashem, O Adonoi, I am not an ish devarim, neither heretofore, nor since Thou hast spoken unto Thy eved; but I am slow of speech, and of a slow lashon.