In Ancient Egypt the Ma-at (or Mayat) was a very important and ancient goddess. She existed from ancient times, long before Isis and Osiris.
It is said that when Ra emerged from the primeval mud, he created Ma-at before any other deities, and that all rulership should be based on the principles of Ma-at. This was phrased: all rulership lives upon the body of Ma-at. Meaning that only by following the principles of Ma-at could a ruler remain in power.
Ma-at is usually depicted as a woman wearing a headdress with one or two long feathers in it, and sometimes just the symbol of the feather is enough. She is usually represented in the Egyptian Book of the Dead as a feather on one pan of a pair of scales, with the heart of the deceased on the other pan.
As long ago as 2500bce the vizir Ptah-Hotep wrote a series of maxims for the instruction of Egyptian youth and says about the principles of Ma-at, which are justice, honour and truth:
'Ma-at is good and its worth is lasting.
It has not been disturbed since the day of its creator, whereas he who transgresses its ordinances is punished.
It lies as a path in front of him who knows nothing.
Wrongdoing has never yet brought its venture to port.
It is true that evil may gain wealth but the strength of truth is that it lasts; a man can say
"It was the property of my father." '
Ma-at Spell for Justice
This spell can be used at any time you have been treated unfairly or unjustly. You will need a white candle, some incense of sandalwood or cedarwood, a small feather, a pen and paper and some red thread.
Light the candle and incense and by the light of the candle write on the piece of paper your petition to the goddess Ma-at. Keep it brief and to the point, for example:
[name] has stolen my ideas and is passing them off as his/her own
I ask for justice
I ask for their crime to be revealed
I ask that they shall not prosper from this crime
In your hands be it.
Put the feather on the writing and roll it up into a scroll. Secure it with red thread and seal it with wax from your candle. Then pass the scroll three times through the incense smoke and say:
None can escape the judgement of Ma-at
So be it.
Put the scroll somewhere safe until it has been fulfilled - I have a small box decorated with Egyptian symbols and I keep all my petitions to the Egyptian gods in there.