Exodus 7:19-20

WEB_Strongs(i)
  19 H3068 Yahweh H559 said H4872 to Moses, H175 "Tell Aaron, H3947 ‘Take H4294 your rod, H5186 and stretch out H3027 your hand H4325 over the waters H4714 of Egypt, H2975 over their rivers, H5104 over their streams, H4723 and over their pools, H98 and over all their ponds H4325 of water, H1818 that they may become blood; H1818 and there shall be blood H776 throughout all the land H4714 of Egypt, H6086 both in vessels of wood H68 and in vessels of stone.'"
  20 H4872 Moses H175 and Aaron H6213 did H3068 so, as Yahweh H6680 commanded; H7311 and he lifted up H4294 the rod, H5221 and struck H4325 the waters H2975 that were in the river, H5869 in the sight H6547 of Pharaoh, H5869 and in the sight H5650 of his servants; H4325 and all the waters H2975 that were in the river H2015 were turned H1818 to blood.