Deuteronomy 9:9-11

9When I went up the mountain to receive the tablets of stone, the tablets of the covenant which the Lord made with you, I remained on the mountain forty days and forty nights; I did not eat food or drink water.

10The Lord gave me the two tablets of stone written with the finger of God; and on them were written all the words which the Lord had spoken to you at the mountain from the midst of the fire on the day of the assembly.

11It came about at the end of forty days and forty nights that the Lord gave me the two tablets of stone, the tablets of the covenant.