Then the magicians said unto Pharaoh, This is the finger of God: and Pharaoh's heart was hardened, and he hearkened not unto them; as the LORD had said.
All Commentaries on Exodus 8:19 Go To Exodus 8
Augustine of Hippo
AD 430
Isn’t the finger of God to be understood as being the Holy Spirit? Read the Gospel, and see that where one Evangelist has the Lord saying, “If I with the Spirit of God cast out demons,” another says, “If I with the finger of God cast out demons.” So if that law too was written by the finger of God, that is, by the Spirit of God, the Spirit by which Pharaoh’s magicians were defeated, so they said, “This is the finger of God, … why can it not be said of it, “For the law of the Spirit of life in Christ Jesus has delivered you from the law of sin and death”? Sermon