出埃及記 4:9

這兩個神蹟若都不信，也不聽你的話，你就從河裏取些水，倒在旱地上，你從河裏取的水必在旱地上變作血。」

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.