Exodus 8:19; Exodus 31:18

19 Then the magicians said to Pharaoh, This is dthe finger of God. But Pharaoh’s heart was hardened, and he would not listen to them, as the Lord had said.

18 And he gave to Moses, when he had finished speaking with him on Mount Sinai, the ttwo tablets of the testimony, tablets of stone, written with uthe finger of God.