رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 193
The Book of Miscellany
Enjoining Good and forbidding Evil
العاشر: عَنْ حُذَيْفَةَ رَضِيَ اللَّه عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: وَالَّذِي نَفْسِي بِيَدِهِ لَتَأْمُرُنَّ بِالْمَعْرُوفِ، وَلَتَنْهَوُنَّ عَنِ الْمُنْكَرِ، أَوْ لَيُوشِكَنَّ اللَّهُ أَنْ يَبْعَثَ عَلَيْكُمْ عِقَابًا مِنْهُ، ثُمَّ تَدْعُونَهُ فَلاَ يُسْتَجَابُ لَكُمْ ((رَوَاهُ التِّرْمِذِيُّ وَقَالَ: حَدِيثٌ حَسَن صَحِيح)).
Hudhaifah (May Allah bepleased with him) reported: The Prophet (ﷺ) said, "By Him in Whose Hand my life is, you either enjoin good and forbid evil, or Allah will certainly soon send His punishment to you. Then you will make supplication and it will not be accepted". [At-Tirmidhi, who categorized it as Hadith Hasan].
Riyad as-Salihin, 193