Hadith 500510
Chapter 2: Purity - كتاب الطهارة
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، وَعَنْ صَفْوَانَ بْنِ سُلَيْمٍ، أَنَّهُمَا أَخْبَرَاهُ عَنْ مُحَمَّدِ بْنِ إِبْرَاهِيمَ بْنِ الْحَارِثِ التَّيْمِيِّ، عَنْ رَبِيعَةَ بْنِ عَبْدِ اللَّهِ بْنِ الْهُدَيْرِ، أَنَّهُ تَعَشَّى مَعَ عُمَرَ بْنِ الْخَطَّابِ ثُمَّ صَلَّى وَلَمْ يَتَوَضَّأْ .
Yahya related to me from Malik that both Muhammad ibn al-Munkadir and Safwan ibn Sulaym transmitted to him from Muhammad ibn Ibrahim ibn al-Harith at-Taymi from Rabia ibn Abdullah ibn al-Hudayr that he had eaten an evening meal with Umar ibn al-Khattab who then prayed without doing wudu.
Reference Muwatta Malik 500510
USC-MSA web (English) reference : Book 2, Hadith 21