Exodus 4:7-9

Revised Standard Version

⁷ Then God said, “Put your hand back into your bosom.” So he put his hand back into his bosom; and when he took it out, behold, it was restored like the rest of his flesh. ⁸ “If they will not believe you,” God said, “or heed the first sign, they may believe the latter sign. ⁹ If they will not believe even these two signs or heed your voice, you shall take some water from the Nile and pour it upon the dry ground; and the water which you shall take from the Nile will become blood upon the dry ground.”