river. This first plague was directed against the Nile, an object of worship, which was thus polluted, and became. means of pollution to the people. Compare Exodus 12:12.
Related Commentaries of Exodus 7:20
Exodus 7:20
20 And Moses and Aaron did so, as the LORD commanded; and he lifted up the rod, and smote the waters that were in the river, in the sight of Pharaoh, and in the sight of his servants; and all the waters that were in the river were turned to blood.