EXO 7:19

19 Yahweh said to Moses/me, “[When you are talking to the king], say to Aaron, ‘Hold your stick out [as though you were holding it] over the water in Egypt—over the rivers, the canals, the ponds, and over the pools of water, in order that [all of it] may become [red like] blood.’ When Aaron does that, there will be blood throughout Egypt, even in wooden jars and in stone jars.”