Muwatta Imam Malik Book of Madina, Hadith 25
Yahya related to me from Malik from Ibn Shihab from Salim ibn Abdullah that Umar ibn al-Khattab turned people back at Sargh according to the hadith of Abd ar-Rahman ibn Awf.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، إِنَّمَا رَجَعَ بِالنَّاسِ مِنْ سَرْغَ عَنْ حَدِيثِ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ، .