حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، حَدَّثَنَا يَزِيدُ بْنُ كَيْسَانَ، حَدَّثَنَا أَبُو حَازِمٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ احْشِدُوا فَإِنِّي سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ ‏"‏ ‏.‏ قَالَ فَحَشَدَ مَنْ حَشَدَ ثُمَّ خَرَجَ نَبِيُّ اللَّهِ صلى الله عليه وسلم فَقَرَأَْ ‏(‏قُلْ هُوَ اللَّهُ أَحَدٌ ‏)‏ ثُمَّ دَخَلَ فَقَالَ بَعْضُنَا لِبَعْضٍ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ فَإِنِّي سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ ‏"‏ ‏.‏ إِنِّي لأُرَى هَذَا خَبَرًا جَاءَهُ مِنَ السَّمَاءِ ثُمَّ خَرَجَ نَبِيُّ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏"‏ إِنِّي قُلْتُ سَأَقْرَأُ عَلَيْكُمْ ثُلُثَ الْقُرْآنِ أَلاَ وَإِنَّهَا تَعْدِلُ ثُلُثَ الْقُرْآنِ ‏"‏ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ ‏.‏ وَأَبُو حَازِمٍ الأَشْجَعِيُّ اسْمُهُ سَلْمَانُ ‏.‏

Narrated Abu Hurairah: that the Messenger of Allah (PBUH) said: "Gather and I shall recite to you one third of the Qur'an." He said: "So whoever was to gather did so, then the Messenger of Allah (PBUH) came out and recited Qul Huwa Allahu Ahad. Then he went back in. Some of them said to each other: "The Messenger of Allah (PBUH) said: 'I shall recite to you one third of the Qur'an I thought that this was news from the Heavens. Allah's Prophet (PBUH) came out and said: "Indeed I said that I would recite to you one third of the Qur'an, and it is indeed equal to one third of the Qur'an." Translation Not Available

Book Ref: Jamiya Tirmidhi Book 45 Hadith 2900
Web Ref:  Jamiya Tirmidhi Vol 5 Book 42 Hadith 2900