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Al-Adab al-Mufrad 732
حَدَّثَنَا أَبُو مَعْمَرٍ، قَالَ: حَدَّثَنَا عَبْدُ الْوَارِثِ، عَنْ وَاصِلٍ مَوْلَى أَبِي عُيَيْنَةَ قَالَ: حَدَّثَنِي خَالِدُ بْنُ عُرْفُطَةَ، عَنْ طَلْحَةَ بْنِ نَافِعٍ، عَنْ جَابِرِ بْنِ عَبْدِ اللهِ قَالَ: كُنَّا مَعَ رَسُولِ اللهِ صلى الله عليه وسلم وَارْتَفَعَتْ رِيحٌ خَبِيثَةٌ مُنْتِنَةٌ، فَقَالَ: أَتَدْرُونَ مَا هَذِهِ؟ هَذِهِ رِيحُ الَّذِينَ يَغْتَابُونَ الْمُؤْمِنِينَ.
Jabir bin Abdullah (ra) said that they were with the Prophet (ﷺ)when a very stinking gush of wind blew over there. The Prophet (ﷺ) they asked his companions (ra) if they knew what that was. He added, "It is the (stinking) air of those people who backbite the believers."
Cited in Al-Adab al-Mufrad (No. 732).