The finger is put either synecdochically for the hand, as it is Exodus 31:18 Psalms 8:3, Psalms 144:1; or metaphorically for the power or virtue, as Luke 11:20, compared with Matthew 12:28. Of God; of that supreme God, whom both the Egyptians and other heathen idolaters acknowledged as superior to all men, and idols, and devils. This they said, lest they should be thought inferior to Moses and Aaron in magical art. But hereby they own the sovereign God to be on Israel's side; and yet, like the devils, they proceed to fight against him. He hearkened not unto them; either to his magicians, of whom he last spake; or rather to Moses and Aaron, as the following words show. For relatives oft belong to the remoter antecedents, as Genesis 9:13 1 Samuel 7:17 Mark 2:13.
Related Commentaries of Exodus 8:19
Exodus 8:19
19 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.