'Finger of God' in the Bible

Then the magicians said to Pharaoh, "This is the finger of God:" and Pharaoh's heart was hardened, and he did not listen to them; as the LORD had spoken.

The LORD delivered to me the two tablets of stone written with the finger of God; and on them were all the words which the LORD spoke with you on the mountain out of the midst of the fire in the day of the assembly.

But if I by the finger of God cast out demons, then the Kingdom of God has come to you.