19 Then Yahweh said to Moses: Say to Aaron, Take your rod, and stretch out your hand over the waters of Egypt, over their streams, over their waterways, over their ponds and over every confluence of their waters that they may become blood. Thus there will come to be blood in all the land of Egypt and in wooden and in stone troughs.
Exodus 7:19 Cross References - CLV
Genesis 1:10
10 And calling is the Elohim the dry part "land" [or "earth"] and the confluence of the water He calls "seas. "And seeing is the Elohim that it is good.
Exodus 8:5-6
Exodus 8:16
16 Then Yahweh said to Moses: Say to Aaron, Stretch out your hand with your rod and smite the soil of the land, and there will come to be lice in all the land of Egypt.
Exodus 9:22-23
22 Yahweh said to Moses: Stretch out your hand to the heavens that hail may come to be in all the land of Egypt, on human and on beast and on all herbage of the field in the land of Egypt.
23 So Moses stretched out his rod to the heavens, and Yahweh, He gave thundering sounds and hail, and fire ran earthward. Thus Yahweh rained hail over the land of Egypt.
Exodus 9:33
33 When Moses went from Pharaoh from the city, and he spread his palms to Yahweh, then the thundering sounds halted, and the hail and the rain was not poured forth earthward.
Exodus 10:12
12 Yahweh said to Moses: Stretch out your hand over the land of Egypt for the locust that it may ascend over the land of Egypt and devour all the herbage of the land and all the fruit of the trees which the hail has let remain.
Exodus 10:21
21 Yahweh said to Moses: Stretch out your hand to the heavens, and let a darkness come on the land of Egypt so that the darkness may cause them to grope.
Exodus 14:21
21 Then Moses stretched out his hand over the sea, and, by a strong east wind all the night, Yahweh caused the sea to go. Thus He made in the sea a drained area when the waters were split apart.
Exodus 14:26
26 Yahweh said to Moses: Stretch out your hand over the sea that the waters may return on the Egyptians, on their chariots and on their horsemen.