Exodus 24:12

24:12 The Lord said to Moses, “Come up to me to the mountain and remain there, and I will give you the stone tablets with the law and the commandments that I have written, so that you may teach them.”

Exodus 32:19

32:19 When he approached the camp and saw the calf and the dancing, Moses became extremely angry. He threw the tablets from his hands and broke them to pieces at the bottom of the mountain.

Exodus 34:28

34:28 So he was there with the Lord forty days and forty nights; he did not eat bread, and he did not drink water. He wrote on the tablets the words of the covenant, the ten commandments.