Quirks, Queries and Commentary—Exodus 7:19-24
When Pharaoh refused to let God's people go, God began a show of signs and wonders that were so amazing, they are remembered to this day. Moses met Pharaoh at the river's edge when Pharaoh went for his morning bath. Egypt revered the Nile for it was, by their observation, the source of all good that came to them but God told Moses to stretch his staff "over the waters of Egypt--over the streams and canals, over the ponds and all the reservoirs'--and they will turn to blood. Blood will be everywhere in Egypt, even in the wooden buckets and stone jars." When Moses did this, "all the water was changed into blood."
How then did the Egyptian magicians manage to do the same thing? Where did they find water that wasn't blood to turn into blood if blood was everywhere, even in wooden buckets and stone jars? And how were the people able to dig in the ground for water if all the water had been turned to blood?