Exodus 4:7-9

Amplified Bible, Classic Edition

⁷ [God] said, Put your hand into your bosom again. So he put his hand back into his bosom, and when he took it out, behold, it was restored as the rest of his flesh.

⁸ [Then God said] If they will not believe you or heed the voice or the testimony of the first sign, they may believe the voice or the witness of the second sign.

⁹ But if they will also not believe these two signs or heed your voice, you shall take some water of the river [Nile] and pour it upon the dry land; and the water which you take out of the river [Nile] shall become blood on the dry land.