Exodus 4:9

And it shall come to pass if they will not believe thee for these two signs, and will not hearken to thy voice, that thou shalt take of the water of the river and pour it upon the dry land, and the water which thou shalt take from the river shall be blood upon the dry land.

And it shall come to pass, if they will not believe also these two signs, neither hearken unto thy voice, that thou shalt take of the water of the river, and pour it upon the dry land: and the water which thou takest out of the river shall become blood upon the dry land.

It will happen, if they will not believe even these two signs or listen to your voice, that you shall take of the water of the river, and pour it on the dry land. The water which you take out of the river will become blood on the dry land.”