“Her,” she said. “Her name is Ammit. Nickname: the Devourer.”

Ren, Book Of The Dead

Ammit the Devourer is mentioned in Book Of The Dead.

In The Book of the Dead

In Ancient Egypt

In ancient Egypt, Ammit the Devourer played a part in death rituals. It was said that at the weighing of the heart, if the dead was found to be unworthy of going into the afterlife, Ammit would eat the heart.