Allah Almighty says: {Those who abuse believing men and women for something they did not commit, they will bear the burden of slander and flagrant sin.} [Surat al-Ahzāb: 58]
1) It is prohibited to harm the believers by word or action, because harming them is one of the gravest sins.
2) The Shariah encourages everything that fosters and endorses love and affection between all the believers.
1559/1- Ibn Mas‘ūd (may Allah be pleased with him) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said: “Reviling a Muslim is Fusūq (disobedience/rebellion), and fighting him is Kufr (disbelief).” [Narrated by Al-Bukhāri and Muslim]
1) Highlighting the great status of the Muslim’s rights, by stating that whoever insults a Muslim unrightfully has committed Fusūq.
2) Fighting a Muslim is an act of disbelief, but this does not necessarily entail that the doer is judged as a disbeliever.
1560/2- Abu Dharr (may Allah be pleased with him) reported that he heard the Prophet (may Allah’s peace and blessings be upon him) say: “No man accuses another of debauchery or disbelief except that it (the accusation) rebounds on him if the one accused is not as he said.” [Narrated by Al-Bukhāri]
1) It is prohibited to curse a Muslim or accuse him of disbelief, for this is one of the gravest sins and most tremendous lies.
2) The Hadīth warns against accusing a specific Muslim of disbelief unless there is a clear Shariah proof to support this. This is because labeling someone as a disbeliever is a religious ruling that must be supported by Shariah texts, approved rules, and the Fatwa of outstanding scholars.
1561/3- Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said: “When two people curse each other, the one who started bears the sin until the wronged one transgresses (in retorting).” [Narrated by Muslim]
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1) It is permissible for a wronged person to return the offense without transgression: {But whoever retaliates after being wronged, there is no blame on them.}
1) Patience and pardoning Muslims are recommended if this would result in realizing an interest; {but whoever pardons and seeks reconciliation, his reward is with Allah}
1562/4- Abu Hurayrah (may Allah be pleased with him) also reported: “A man who drank alcohol was brought to the Prophet (may Allah’s peace and blessings be upon him), who said: ‘Beat him.’ So some of us beat him with their hands, some with their sandals, and some with their garment (by twisting it like a lash). Then, when the man left, someone said: ‘May Allah disgrace you!’ Upon that, he (the Prophet) said: ‘Do not say this! Do not help the devil to overpower him.’” [Narrated by Al-Bukhāri]
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1) Although alcoholic drinks are prohibited and the one who consumes them is subjected to the punishment of lashing and beating, it is impermissible to curse the one who has repented of it.
2) The Shariah forbids helping the devil in misguiding people, because this results in the spread of evil and corruption.
1563/5- He also reported: I heard the Messenger of Allah (may Allah’s peace and blessings be upon him) say: “Whoever falsely accuses his slave of committing adultery will be subjected to the punishment (of slander) on the Day of Judgment, unless the slave is as he said.” [Narrated by Al-Bukhāri and Muslim]
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1) It is prohibited to accuse someone of committing adultery, for doing that is one of the gravest sins.
2) The one who escapes retribution in the worldly life will have it inflicted upon him in the Hereafter.