Sahih al-Bukhari, Hadith 2034 ⓘ
Narrated `Aisha: The Prophet intended to practice I`tikaf and when he reached the place where he intended to perform I`tikaf, he saw some tents, the tents of `Aisha, Hafsa and Zainab. So, he said, "Do you consider that they intended to do righteousness by doing this?" And then he went away and did not perform I`tikaf (in Ramadan) but performed it in the month of Shawwal for ten days.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَمْرَةَ بِنْتِ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم أَرَادَ أَنْ يَعْتَكِفَ، فَلَمَّا انْصَرَفَ إِلَى الْمَكَانِ الَّذِي أَرَادَ أَنْ يَعْتَكِفَ إِذَا أَخْبِيَةٌ خِبَاءُ عَائِشَةَ، وَخِبَاءُ حَفْصَةَ، وَخِبَاءُ زَيْنَبَ، فَقَالَ " آلْبِرَّ تَقُولُونَ بِهِنَّ " . ثُمَّ انْصَرَفَ، فَلَمْ يَعْتَكِفْ، حَتَّى اعْتَكَفَ عَشْرًا مِنْ شَوَّالٍ.
also referenced under: Book 33, Hadith 9 (In-Book) & Volume 3, Book 33, Hadith 250 (USC-MSA)