The time before Islam was known as the days of ignorance. The Arabs would behave very badly and did many unjust and evil things. There would be many wars between the different tribes and many innocent people were killed or injured.
When Muhammad (pbuh) was made into a prophet and sent to the people, the Arabs began to change. They changed from being the worst example of good behaviour to being the best example of good behaviour. They began to worship only Allah and leave all their evil habits behind.
There was peace and justice throughout the lands as more and more people became practicing Muslims. Everyone lived in harmony and were very happy.
Once a noble women from the tribe of Makhzum was caught stealing. Her tribe were very powerful and well respected in Makkah. They did not want this women to get punished for her crime so decided to speak to a close companion of the Prophet (pbuh) for help.
They asked Usamah bin Zaid to speak to the Prophet (pbuh) so that the punishment could be averted. The Prophet (pbuh) replied that previous generations of people were ruined because the noble people were not punished for a crime while the poor people were. Even if Fatima, Prophet Muhammad's beloved daughter, committed the crime, she would also be punished like everyone else.
The laws have to be applied justly and evenly to all people. If someone is very powerful or rich does not mean that they are above the law. The Prophet (pbuh) was just and commanded us to be just as well.