Osama Elsayed Mahmoud Mohamed. "Ahmad’s narration on the authority of al-Shafi’i on the authority of Malik on the authority of Nafi’ on the authority of Ibn Umar, may God be pleased with him, and its high value among the hadithers", The bulletin of the Faculty of Islamic and Arabic Studies for Girls in Alexandria, 33, 7, 2017, 1165-1209. doi: 10.21608/bfda.2017.22037