Shemoth (Exodus) 7:19

And יהוה spoke to Mosheh, “Say to Aharon, ‘Take your rod and stretch out your hand over the waters of Mitsrayim, over their streams, over their rivers, over their ponds, and over all their pools of water, that they become blood. And there shall be blood in all the land of Mitsrayim, both in wooden and in stone containers.’ ”