"The Messenger of Allah would Yujawir (stay in I'tikaf) during the last ten (nights) of Ramadan and he said: 'Seek the Night of Al-Qadr during the last ten (nights) of Ramadan.'"  

كَانَ رَسُولُ اللَّهِ ﷺ يُجَاوِرُ فِي الْعَشْرِ الأَوَاخِرِ مِنْ رَمَضَانَ وَيَقُولُ تَحَرَّوْا لَيْلَةَ الْقَدْرِ فِي الْعَشْرِ الأَوَاخِرِ مِنْ رَمَضَانَ وَفِي الْبَابِ عَنْ عُمَرَ وَأُبَىٍّ وَجَابِرِ بْنِ سَمُرَةَ وَجَابِرِ بْنِ عَبْدِ اللَّهِ وَابْنِ عُمَرَ وَالْفَلَتَانِ بْنِ عَاصِمٍ وَأَنَسٍ وَأَبِي سَعِيدٍ وَعَبْدِ اللَّهِ بْنِ أُنَيْسٍ وَأَبِي بَكْرَةَ وَابْنِ عَبَّاسٍ وَبِلاَلٍ وَعُبَادَةَ بْنِ الصَّامِتِ  

"I said to Ubayy bin Ka'b: 'O Abu Al-Mundhir! How do you know that it is the night of the twenty-seventh?' He said: 'Rather, the Messenger of Allah informed us that it is a night (after which) the sun rises without rays, so we counted and we remembered it. By Allah! Ibn Mas'ud learned that it is in Ramadan and that it is the nigh of the twenty-seventh, but he did not want to inform you lest you would depend on it."  

أَخْبَرَنَا رَسُولُ اللَّهِ ﷺ أَنَّهَا لَيْلَةٌ صَبِيحَتُهَا تَطْلُعُ الشَّمْسُ لَيْسَ لَهَا شُعَاعٌ فَعَدَدْنَا وَحَفِظْنَا وَاللَّهِ لَقَدْ عَلِمَ ابْنُ مَسْعُودٍ أَنَّهَا فِي رَمَضَانَ وَأَنَّهَا لَيْلَةُ سَبْعٍ وَعِشْرِينَ وَلَكِنْ كَرِهَ أَنْ يُخْبِرَكُمْ فَتَتَّكِلُوا  

"My father narrated to me: 'The Night of Al-Qadr was mentioned in the presence of Abu Bakrah, so he said: "I do not search for it due to something that I heard from the Messenger of Allah, except for during the last ten (nights); for indeed I heard him say: 'Search for it when nine remain, or; when seven remain, or; when five remain, or; during the last three nights.'" He (Uyainah) said: "During the twenty (nights) of Ramadan, Abu Bakrah used to perform Salat just as he performed Salat during the rest of the year. But when the (last) ten began, he would struggle (performing more Salat during the night)."  

ذُكِرَتْ لَيْلَةُ الْقَدْرِ عِنْدَ أَبِي بَكْرَةَ فَقَالَ مَا أَنَا بِمُلْتَمِسِهَا لِشَيْءٍ سَمِعْتُهُ مِنْ رَسُولِ اللَّهِ ﷺ إِلاَّ فِي الْعَشْرِ الأَوَاخِرِ فَإِنِّي سَمِعْتُهُ يَقُولُ الْتَمِسُوهَا فِي تِسْعٍ يَبْقَيْنَ أَوْ فِي سَبْعٍ يَبْقَيْنَ أَوْ فِي خَمْسٍ يَبْقَيْنَ أَوْ فِي ثَلاَثٍ أَوْ آخِرِ لَيْلَةٍ قَالَ وَكَانَ أَبُو بَكْرَةَ يُصَلِّي فِي الْعِشْرِينَ مِنْ رَمَضَانَ كَصَلاَتِهِ فِي سَائِرِ السَّنَةِ فَإِذَا دَخَلَ الْعَشْرُ اجْتَهَدَ