Ma'at-- is the Egyptian goddess of truth and order. She spends a lot of time in the Egyptian underworld. According to the Book of the Dead, after you die, the canopic jar that contained your preserved heart (the organ that housed the soul) was set on one side of the Scales of Judgement. Ma’at then placed her Feather of Truth on the other side. The jackal-headed god Anubis then weighed the two against each other.
Maat is the Goddess of Truth and Justice who personifies cosmic order and harmony as established by the Creator God at the beginning of time. Her symbol is an ostrich feather. Judges were regarded as priests of Maat. In the hall of judgement at the weighing of the heart, the heart of the deceased was placed on the scales of justice, balanced against the feather of Maat, symbol of justice.