Deuteronomy 9:9-10

This happened when I was on the mountain receiving the tablets of stone inscribed with the words of the covenant that the LORD had made with you. I was there for forty days and forty nights, and all that time I ate no food and drank no water. The LORD gave me the two tablets on which God had written with his own finger all the words he had spoken to you from the heart of the fire when you were assembled at the mountain.