Sunan Ibn Majah Book 7, Hadith 1771

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَعْلَى بْنُ عُبَيْدٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ ـ صلى الله عليه وسلم ـ إِذَا أَرَادَ أَنْ يَعْتَكِفَ صَلَّى الصُّبْحَ ثُمَّ دَخَلَ الْمَكَانَ الَّذِي يُرِيدُ أَنْ يَعْتَكِفَ فِيهِ فَأَرَادَ أَنْ يَعْتَكِفَ الْعَشْرَ الأَوَاخِرَ مِنْ رَمَضَانَ فَأَمَرَ فَضُرِبَ لَهُ خِبَاءٌ فَأَمَرَتْ عَائِشَةُ بِخِبَاءٍ فَضُرِبَ لَهَا وَأَمَرَتْ حَفْصَةُ بِخِبَاءٍ فَضُرِبَ لَهَا فَلَمَّا رَأَتْ زَيْنَبُ خِبَاءَهُمَا أَمَرَتْ بِخِبَاءٍ فَضُرِبَ لَهَا فَلَمَّا رَأَى ذَلِكَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ ‏ "‏ آلْبِرَّ تُرِدْنَ ‏"‏ ‏.‏ فَلَمْ يَعْتَكِفْ فِي رَمَضَانَ وَاعْتَكَفَ عَشْرًا مِنْ شَوَّالٍ ‏.‏

It was narrated that ‘Aishah said:“When the Prophet (ﷺ) wanted to start I’tikaf, he would pray the Subh, then he would enter the place where he wanted to observe I’tikaf. He wanted to spend the last ten days of Ramadan in I’tikaf, so he ordered that a tent be set up for him.” Then ‘Aishah ordered that a tent be set up for her, and Hafash ordered that a tent be set up for her. When Zainab saw their two tents, she also ordered that a tent be set up for her. When the Messenger of Allah (ﷺ) saw that, he said: “It is righteousness that you seek?” Then he did not observe I’tikaf during Ramadan, and he observed I’tikaf during ten days of Shawwal