Êxodo 4:9

9 Se nem ainda crerem mediante estes dois sinais, nem te ouvirem a voz, tomarás das águas do rio e as derramarás na terra seca; e as águas que do rio tomares tornar-se-ão em sangue sobre a terra.

9 But if they do not believe these two signs or listen to you, take some water from the Nile and pour it on the dry ground. The water you take from the river will become blood on the ground."