Exodus 24:12-15

The LORD said to Moses, “Come up the mountain to me. Wait there, and I will give you two stone tablets. On these are the teachings and the commands I have written to instruct the people.” So Moses and his helper Joshua set out, and Moses went up to Sinai, the mountain of God. Moses said to the elders, “Wait here for us until we come back to you. Aaron and Hur are with you, and anyone who has a disagreement with others can take it to them.” When Moses went up on the mountain, the cloud covered it.