(36) باب إِذَا نَذَرَ ثُمَّ أَسْلَمَ قَبْلَ أَنْ يَفِيَ
It was narrated from Ibn 'Umar, that 'Umar had vowed to spend a night in 'Itikaf during the Jahiliyyah. He asked the Messenger of Allah about that, and he ordered him to perform the 'Itikaf. (DE)
Reference (DE): Sunan an-Nasa'i 3820 (DE)
In-book reference (DE): Book 35, Hadith 60 (DE)
English translation (DE): Vol. 4, Book 35, Hadith 3851 (DE)