In the Book of Exodus, the mountain that Moses ascended to receive the tablets of the law (the Ten Commandments) from God. God shrouded the mountain in a cloud, and made thunder, lightning, and trumpet blasts come forth from it. The Israelites were commanded to stay away from it while Moses went into God's presence.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.