Messenger of Allah ﷺ mentioned that he would practice Iʿtikaf in the last ten days of Ramadan. ʿAisha asked his permission to perform Iʿtikaf and he permitted her. Hafsa asked ʿAisha to take his permission for her, and she did so. When Zainab bint Jahsh saw that, she ordered a tent to be pitched for her and it was pitched for her. Messenger of Allah ﷺ used to proceed to his tent after the prayer. So, he saw the tents ans asked, "What is this?" He was told that those were the tents of Aisha, Hafsa, and Zainab. Allah's Apostle said, "Is it righteousness which they intended by doing so? I am not going to perform Iʿtikaf." So he returned home. When the fasting month was over, he performed Itikar for ten days in the month of Shawwal.  

أَنَّ رَسُولَ اللَّهِ ﷺ ذَكَرَ أَنْ يَعْتَكِفَ الْعَشْرَ الأَوَاخِرَ مِنْ رَمَضَانَ فَاسْتَأْذَنَتْهُ عَائِشَةُ فَأَذِنَ لَهَا وَسَأَلَتْ حَفْصَةُ عَائِشَةَ أَنْ تَسْتَأْذِنَ لَهَا فَفَعَلَتْ فَلَمَّا رَأَتْ ذَلِكَ زَيْنَبُ ابْنَةُ جَحْشٍ أَمَرَتْ بِبِنَاءٍ فَبُنِيَ لَهَا قَالَتْ وَكَانَ رَسُولُ اللَّهِ ﷺ إِذَا صَلَّى انْصَرَفَ إِلَى بِنَائِهِ فَبَصُرَ بِالأَبْنِيَةِ فَقَالَ مَا هَذَا قَالُوا بِنَاءُ عَائِشَةَ وَحَفْصَةَ وَزَيْنَبَ فَقَالَ رَسُولُ اللَّهِ ﷺ آلْبِرَّ أَرَدْنَ بِهَذَا مَا أَنَا بِمُعْتَكِفٍ فَرَجَعَ فَلَمَّا أَفْطَرَ اعْتَكَفَ عَشْرًا مِنْ شَوَّالٍ