(16) CHAPTER. Whoever made a vow in the Pre-lslamic Period of Ignorance to perform Itikaf and then embraced Islam.
Narrated Ibn `Umar: that `Umar had vowed in the Pre-Islamic period to perform I`tikaf in Al-Masjid-al-Haram. (A subnarrator thinks that `Umar vowed to perform I`tikaf for one night.) Allah's Apostle said to `Umar, Fulfill your vow.