Exodus 24:15 in the World English Bible
Moses went up on the mountain, and the cloud covered the mountain.
Context
14 And he said unto the elders, Tarry ye here for us, until we come again unto you: and, behold, Aaron and Hur are with you: if any man have any matters to do, let him come unto them.
15 And Moses went up into the mount, and a cloud covered the mount.
16 And the glory of the LORD abode upon mount Sinai, and the cloud covered it six days: and the seventh day he called unto Moses out of the midst of the cloud.