Narrated Abu Huraira: The Prophet used to perform I`tikaf every year in the month of Ramadan for ten days, and when it was the year of his death, he stayed in I`tikaf for twenty days.

Narrated `Abdullah bin `Umar: Allah's Apostle used to practice I`tikaf in the last ten days of the month of Ramadan.

Narrated `Aisha: (the wife of the Prophet) The Prophet used to practice I`tikaf in the last ten days of Ramadan till he died and then his wives used to practice I`tikaf after him.

Narrated Abu-Huraira: Gabriel used to repeat the recitation of the Qur'an with the Prophet once a year, but he repeated it twice with him in the year he died. The Prophet used to stay in I`tikaf for ten days every year (in the month of Ramadan), but in the year of his death, he stayed in I`tikaf for twenty days.