14/1. Chapter:
حديث عَبْدِ اللهِ بْنِ عُمَرَ، قَالَ: كَانَ رَسُولُ اللهِ ﷺ يَعْتَكِفُ الْعَشْرَ الأَوَاخِرَ مِنْ رَمَضَانَ.
Allâh's Messenger صلى الله عليه وسلم used to practice I'tikâf in the last ten days of the month of Ramadân. ( Sahîh Al-Bukhâri, Hadîth No. 242, Vol. 3 )
حديث عَائِشَةَ، زَوْجِ النَّبِيِّ ﷺ، أَنَّ النَّبِيَّ ﷺ، كَانَ يَعْتَكِفُ الْعَشْرَ الأَوَاخِرَ مِنْ رَمَضَانَ، حَتَّى تَوَفَّاهُ اللهُ، ثُمَّ اعْتَكَفَ أَزْوَاجُهُ مِنْ بَعْدِهِ.
The Prophet صلى الله عليه وسلم used to practice I'tikâf in the last ten days of Ramadân till he died; and then his wives used to practice I'tikâf after him. ( Sahîh Al-Bukhâri, Hadîth No. 243, Vol. 3 )
14/2. Chapter:
حديث عَائِشَةَ، قَالَتْ: كَانَ النَّبِيُّ ﷺ يَعْتَكِفُ فِي الْعَشْرِ الأَوَاخِرِ مِنْ رَمَضَانَ، فَكُنْتُ أَضْرِبُ لَهُ خِبَاءً، فَيُصَلِّي الصُّبْحَ، ثُمَّ يَدْخُلُهُ؛ فَاسْتَأْذَنَتْ حَفْصَةُ عَائِشَةَ أَنْ تَضْرِبَ خِبَاءً، فَأَذِنَتْ لَهَا فَضَرَبَتْ خِبَاءً؛ فَلَمَّا رَأَتْهُ زَيْنَبُ ابْنَةُ جَحْشٍ ضَرَبَتْ خِبَاءً آخَرَ؛ فَلَمَّا أَصْبَحَ النَّبِيُّ ﷺ رَأَى الأَخْبِيَةَ، فَقَالَ: مَا هذَا فَأُخْبِرَ فَقَالَ النَّبِيُّ ﷺ: آلْبِر تُرَوْنَ بِهِنَّ فَتَرَكَ الاعْتِكَافَ ذلِكَ الشَّهْرَ، ثُمَّ اعْتَكَفَ عَشْرًا مِنْ شَوَّالٍ.
The Prophet صلى الله عليه وسلم used to practice I'tikâf in the last ten days of Ramadân and I used to pitch a tent for him, and after offering the morning Salât (prayer), he used to enter the tent. Hafsa asked the permission of 'Aisha to pitch a tent for her and she allowed her, and she pitched her tent. When Zainab bint Jahsh saw it, she pitched another tent.In the morning the Prophet ﷺ noticed the tents. He said, "What is this?" He was told of the whole situation. Then the Prophet ﷺ said, "Do you think that they intended to do Al-Birr (righteousness) by doing this?" He therefore abandoned the I'tikâf in that month and observed I'tikâf for ten days in the month of Shawwâl.( Sahîh Al-Bukhâri, Hadîth No. 249, Vol. 3)
14/3. Chapter:
حديث عَائِشَةَ، قَالَتْ: كَانَ النَّبِيُّ ﷺ، إِذَا دَخَلَ الْعَشْرُ شَدَّ مِئْزَرَهُ وَأَحْيَا لَيْلَهُ، وَأَيْقَظَ أَهْلَهُ.
With the start of the last ten days of Ramadân, the Prophet ﷺ used to tighten his belt (i.e. work hard) and used to pray all the night, and used to keep his family awake for the prayers. ( Sahîh Al-Bukhâri, Hadîth No. 241, Vol. 3)