وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ بُشَيْرِ بْنِ يَسَارٍ، مَوْلَى بَنِي حَارِثَةَ عَنْ سُوَيْدِ بْنِ النُّعْمَانِ، أَنَّهُ أَخْبَرَهُ أَنَّهُ، خَرَجَ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم عَامَ خَيْبَرَ حَتَّى إِذَا كَانُوا بِالصَّهْبَاءِ - وَهِيَ مِنْ أَدْنَى خَيْبَرَ - نَزَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَصَلَّى الْعَصْرَ ثُمَّ دَعَا بِالأَزْوَادِ فَلَمْ يُؤْتَ إِلاَّ بِالسَّوِيقِ فَأَمَرَ بِهِ فَثُرِّيَ فَأَكَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَأَكَلْنَا ثُمَّ قَامَ إِلَى الْمَغْرِبِ فَمَضْمَضَ وَمَضْمَضْنَا ثُمَّ صَلَّى وَلَمْ يَتَوَضَّأْ ‏.‏

Yahya related to me from Malik from Yahya ibn Said from Bushayribn Yasar, the mawla of the Bani Haritha, that Suwayd ibn anNuman toldhim that he went with the Messenger of Allah, may Allah bless him andgrant him peace, on the expedition to Khaybar. When they reached asSuhba, which was near Khaybar, the Messenger of Allah, may Allah blesshim and grant him peace, stopped and prayed asr. He asked forprovisions but only parched barley was brought, so he asked for it tobe moistened. The Messenger of Allah, may Allah bless him and granthim peace, ate and the people ate with him. Then he got up to domaghrib and rinsed his mouth out and they rinsed out theirs. Then heprayed without doing wudu. Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 50
Web Ref:  Muwatta Imam Malik Book 2 Hadith 20