Yahya related to me from Malik from Ibn Shihab from Salim ibnAbdullah that Umar ibn al-Khattab turned people back at Sarghaccording to the hadith of Abd ar-Rahman ibn Awf. (JA)
USC-MSA web (English) reference: Book 45, Hadith 25 (JA)
Arabic reference (JA): Book 45, Hadith 1624 (JA)