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 wasnarrated that ‘Aishah said: “When the Prophet (PBUH) wanted tostart I’tikaf, he would pray the Subh, then he would enter theplacewhere he wanted to observe I’tikaf. He wanted to spend thelast tendays of Ramadan in I’tikaf, so he ordered that a tent beset up forhim.” Then ‘Aishah ordered that a tent be set up forher, and Hafashordered that a tent be set up for her. When Zainabsaw their twotents, she also ordered that a tent be set up for her.When theMessenger of Allah (PBUH) saw that, he said: “It isrighteousness thatyou seek?” Then he did not observe I’tikafduring Ramadan, and heobserved I’tikaf during ten days of Shawwal. Translation Not Available

Book Ref: Sunan Ibn Majah Book 7 Hadith 1771
Web Ref:  Sunan Ibn Majah Vol 1 Book 7 Hadith 1771