Sahih al-Bukhari 4470
Narrated Ibn Abu Habib:
Abu Al-Khair said, "As-Sanabih, I asked (me), 'When did you migrate?' I (i.e. Abu Al-Khair) said, 
'We went out from Yemen as emigrants and arrived at Al-Juhfa, and there came a rider whom I asked 
about the news. The rider said: We buried the Prophet (ﷺ) five days ago." I asked (As-Sanabihi), 'Did you 
hear anything about the night of Qadr?' He replied, 'Bilal, the Mu'adh-dhin of the Prophet (ﷺ) informed 
me that it is on one of the seven nights of the last ten days (of Ramadan).
حَدَّثَنَا أَصْبَغُ، قَالَ أَخْبَرَنِي ابْنُ وَهْبٍ، قَالَ أَخْبَرَنِي عَمْرٌو، عَنِ ابْنِ أَبِي حَبِيبٍ، عَنْ أَبِي الْخَيْرِ، عَنِ الصُّنَابِحِيِّ، أَنَّهُ قَالَ لَهُ مَتَى هَاجَرْتَ قَالَ خَرَجْنَا مِنَ الْيَمَنِ مُهَاجِرِينَ، فَقَدِمْنَا الْجُحْفَةَ، فَأَقْبَلَ رَاكِبٌ فَقُلْتُ لَهُ الْخَبَرَ فَقَالَ دَفَنَّا النَّبِيَّ صلى الله عليه وسلم مُنْذُ خَمْسٍ‏.‏ قُلْتُ هَلْ سَمِعْتَ فِي لَيْلَةِ الْقَدْرِ شَيْئًا قَالَ نَعَمْ أَخْبَرَنِي بِلاَلٌ مُؤَذِّنُ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ فِي السَّبْعِ فِي الْعَشْرِ الأَوَاخِرِ‏.‏