Zaqar

In Mesopotamian mythology, Zaqar (also known as Zaq-qar, Dzakar, Zaqiqu, or Ziqiqu) is the messenger and sukkal of the moon god Sin. Zaqar is thought to be the son of Bel.

He relays these messages to mortals through his power over their dreams and nightmares. The Babylonians believed that if you spoke in your sleep it could be the work of Zaqar. Zaqar is also believed to have wrote the "Iškar Zaqīqu" or the dream book.

The ancient Akkadian's believed that dreams were the messages of the gods and many dreams were considered warnings. Zaqar's responsibility was to send these messages to the appropriate human recipients.