Exodus 24:12-18

Now the LORD said to Moses, “Come up to Me on the mountain and remain there, and I will give you the stone tablets with the law and the commandment which I have written for their instruction.” So Moses arose with Joshua his servant, and Moses went up to the mountain of God. But to the elders he said, “Wait here for us until we return to you. And behold, Aaron and Hur are with you; whoever has a legal matter, let him approach them.” Then Moses went up to the mountain, and the cloud covered the mountain. The glory of the LORD rested on Mount Sinai, and the cloud covered it for six days; and on the seventh day He called to Moses from the midst of the cloud. And to the eyes of the sons of Israel the appearance of the glory of the LORD was like a consuming fire on the mountain top. Moses entered the midst of the cloud as he went up to the mountain; and Moses was on the mountain forty days and forty nights.