It is narrated from Sayyiduna Abu Sufyan bin Jabir (may Allah be pleased with him), he says that during the blessed era of the Messenger of Allah (peace and blessings of Allah be upon him), a foul-smelling wind blew, so the Messenger of Allah (peace and blessings of Allah be upon him) said: "Some hypocrites have backbitten some Muslims, and because of this, this wind has been sent."
Hadith Referenceالادب المفرد / كتاب / 733
Hadith Gradingالألبانی:حسن
Hadith Takhrij«حسن : أخرجه عبد بن حميد : 1028 و البيهقي فى الشعب : 93/9 - انظر غاية المرام : 429»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: When backbiting a hypocrite is such a grave offense that it pollutes the environment, then how much greater a crime will it be to backbite a Muslim?
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 733