Payment of the injury in what happened among the companions

There is no doubt that the issue of "fitnah" that occurred in the first generation among the companions, may Allah be pleased with them, is considered one of the most important events that took place in the history of Islam. For this reason, people have long differed in investigating its details and interpreting its explanations. After observation and investigation, we find that it has been disputed by three branches of Islamic sciences: (the science of creed, the science of history, and the science of hadith). Therefore, I would like to discuss this issue with some close detail, not excessive elaboration, and this is only because of its importance.