Narrated from Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her), the wife of the Noble Prophet (peace and blessings be upon him), that the Noble Prophet (peace and blessings be upon him) used to observe i'tikaf continuously during the last ten days of Ramadan, until Allah Almighty caused him (peace and blessings be upon him) to pass away. Then, after him (peace and blessings be upon him), his wives observed i'tikaf.