'Stretched Out His Hand' in the Bible

Aaron stretched out his hand over the waters of Egypt; and the frogs came up, and covered the land of Egypt.

They did so; and Aaron stretched out his hand with his rod, and struck the dust of the earth, and there were lice on man, and on animal; all the dust of the earth became lice throughout all the land of Egypt.

Moses stretched out his hand over the sea, and the LORD caused the sea to go back by a strong east wind all the night, and made the sea dry land, and the waters were divided.

Moses stretched out his hand over the sea, and the sea returned to its strength when the morning appeared; and the Egyptians fled against it. The LORD overthrew the Egyptians in the midst of the sea.