Sahih Muslim Book: 6, Hadith: 1581

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَأَبُو كُرَيْبٍ قَالاَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ عَاصِمٍ، عَنْ أَنَسٍ، قَالَ سَأَلْتُهُ عَنِ الْقُنُوتِ، قَبْلَ الرُّكُوعِ أَوْ بَعْدَ الرُّكُوعِ فَقَالَ قَبْلَ الرُّكُوعِ ‏.‏ قَالَ قُلْتُ فَإِنَّ نَاسًا يَزْعُمُونَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَنَتَ بَعْدَ الرُّكُوعِ ‏.‏ فَقَالَ إِنَّمَا قَنَتَ رَسُولُ اللَّهِ صلى الله عليه وسلم شَهْرًا يَدْعُو عَلَى أُنَاسٍ قَتَلُوا أُنَاسًا مِنْ أَصْحَابِهِ يُقَالُ لَهُمُ الْقُرَّاءُ ‏.‏ Asim reported:I asked Anas whether Qunut was observed (by the Holy prophet) before ruku’ or after ruku’. He replied: Before ruku’. I said: People conceive that the Messenger of Allah (may peace be upon him) observed Qunut after the ruku’. He said: The Messenger of Allah (may peace be upon him) observed Qunut (after the ruku’ as the people conceive it) for a mouth invoking curse upon those persons who had killed men among his Companions who were called the reciter (of t...