Deuteronomy 9:9-10

I had gone up the mountain to receive the stone tablets, the tablets on which was written the covenant ADONAI had made with you. I stayed on the mountain forty days and nights without eating food or drinking water.

Then ADONAI gave me the two stone tablets inscribed by the finger of God; and on them was written every word ADONAI had said to you from the fire on the mountain the day of the assembly.