It seems from the account that Pharaoh was told that the God of the Hebrews would, if he refused to let the Israelites go, change all the waters of Egypt into blood, and that, upon his refusal, they were so changed. This had, however, no influence upon him, for the reason that his own magicians did the same. It does not appear that Moses and Aaron expressed the least surprise at the success of the Egyptian sorcerers. At that time it was believed that each nation had its own god. The only claim that Moses and Aaron made for their God was, that he was the greatest and most powerful of all the gods, and that with anything like an equal chance he could vanquish the deity of any other nation. After the waters were changed to blood Moses and Aaron waited for seven days. At the end of that time God told Moses to again go to Pharaoh and demand the release of his people, and to inform him that, if he refused, God would strike all the borders of Egypt with frogs. That he would make frogs so plentiful that they would go into the houses of Pharaoh, into his bedchamber, upon his bed, into the houses of his servants, upon his people, into their ovens, and even into their kneading troughs. This threat had no effect whatever upon Pharaoh. And thereupon Aaron stretched out his hand over the waters of Egypt, and the frogs came up and covered the land. The magicians of Egypt did the same, and with their enchantments brought more frogs upon the land of Egypt. These magicians do not seem to have been original in their ideas, but so far as imitation is concerned, were perfect masters of their art. The frogs seem to have made such an impression upon Pharaoh that he sent for Moses and asked him to entreat the Lord that he would take away the frogs. Moses agreed to remove them from the houses and the land, and allow them to remain only in the rivers. Accordingly the frogs died out of the houses, and out of the villages, and out of the fields, and the people gathered them together in heaps. As soon as the frogs had left the houses and fields, the heart of Pharaoh became again hardened, and he refused to let the people go. Aaron then, according to the command of God, stretched out his hand, holding the rod, and smote the dust of the earth, and it became lice in man and in beast, and all the dust became lice throughout the land of Egypt. Pharaoh again sent for his magicians, and they sought to do the same with their enchantments, but they could not. Whereupon the sorcerers said unto Pharaoh: "This is the finger of God."