Abu Dawud Book 7, Hadith Number 2457.Abu Dawud Book 7. Fasting Chapter : Not known. Narated By Ubayy ibn Ka’b : The Prophet (PBUH) used to observe i’tikaf during the last ten days of Ramadan. One year he did not observe i’tikaf. When the next year came, he observed i’tikaf for twenty nights (i.e. days). Related Previous Post Abu Dawud Book 7, Hadith Number 2467. Next Post Abu Dawud Book 7, Hadith Number 2453.