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Narrated Aisha, Ummul Mu'minin, may Allah be pleased with her:
Something of her was stolen, and she began to curse him (i.e. the thief). The Messenger of Allah (may the peace and blessings of Allah be upon him) said to her: Do not lessen his sin (through supplicating against him).
The Muslim should not be accustomed to cursing or to saying the indecent words, he may not be angry for any of the matters of the world unless it is related to the religion or the honor, or that it harms the life or the offspring or wealth. If the Muslim became angry, he shall pardon and forgive. Yet, if the ignorant people address him [harshly], he will say [words of] peace.
Since the believer knew that Allah is Allah is Exalted in Might and Owner of Retribution, he will let the mater to Allah and may wait for his vengeance. It is not wise that the slave chooses a specific kind of revenge for the wrongdoer. Rather, he shall wait for Allah to decide what is best.
If it is necessary for the believer to relieve himself, let him say: sufficient for me is Allah and he is the disposer of the affairs. It will remove his anger, release his concern, and hasten the revenge of those who wronged him.
The Prophet (may the peace and blessings of Allah be upon him) is the greatest teacher who purifies the souls, and educate the men and the women in a unique way so that the Muslim reaches a great degree of closeness and divine love. From this Hadeeth that the companions of the Prophet (may Allah be pleased with them) learned to pardon and forgive some of those who abused and wronged them.