Riyad as-Salihin 1268
عن ابن عمر رضي الله عنهما، قال كان رسول الله صلى الله عليه وسلم يعتكف العشر الأواخر من رمضان. متفق عليه.
عن ابن عمر رضي الله عنهما قال كان رسول الله صلي الله عليه وسلم يعتكف العشر الاواخر من رمضان متفق عليه
Riyad as-Salihin · Book 10 · 3 hadith
‘Ā’ishah, Mother of the Believers (may Allah be pleased with her) and wife of the Prophet (may Allah's peace and blessings be upon him) reported: The Prophet (may Allah's peace and blessings be upon him) used to practice I‘tikāf (seclusion for worship) during the last ten of Ramadan until he died. Then his wives observed I‘tikāf after him.
Abu Hurayrah (may Allah be pleased with him) reported: The Prophet (may Allah's peace and blessings be upon him) used to observe I‘tikāf during each Ramadan for ten days. The year in which he died, he observed I‘tikāf for twenty days.