There are only three times in the Bible in which the finger of God is mentioned.
When Aaron created lice in the third plague of Egypt, the Egyptian magicians said it was done with the finger of God.
the LORD said unto Moses, Say unto Aaron, Stretch out thy rod, and smite the dust of the land, that it may become lice throughout all the land of Egypt. And they did so; for Aaron stretched out his hand with his rod, and smote the dust of the earth, and it became lice in man, and in beast ... And the magicians .. could not ... Then the magicians said unto Pharaoh, This is the finger of God. Exodus 8:16-19
When God wrote on the stone tablets with his finger.
And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, two tables of testimony, tables of stone, written with the finger of God. Exodus 31:18
And the LORD delivered unto me two tables of stone written with the finger of God; and on them was written according to all the words, which the LORD spake with you in the mount out of the midst of the fire in the day of the assembly. Deuteronomy 9:10
And when Jesus cast out devils with God's finger.
But if I with the finger of God cast out devils, no doubt the kingdom of God is come upon you. Luke 11:20