Sunan Ibn Majah, Book 1, Hadith 531 (In-Book) ⓘ

Suwaid bin Nu'man Ansari narrated that : They went out with the Messenger of Allah to Khaibar. When they reached As-Sahba' (a place near Khaibar), he performed 'Asr (Afternoon prayer), then he called for food, but no food was brought except for Sawiq. So they ate that and drank, and then he called for water and rinsed his mouth, then he stood up and led us for Maghrib (Sunset) prayer."

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَلِيُّ بْنُ مُسْهِرٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ بُشَيْرِ بْنِ يَسَارٍ، أَنْبَأَنَا سُوَيْدُ بْنُ النُّعْمَانِ الأَنْصَارِيُّ، أَنَّهُمْ خَرَجُوا مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ إِلَى خَيْبَرَ حَتَّى إِذَا كَانُوا بِالصَّهْبَاءِ صَلَّى الْعَصْرَ ثُمَّ دَعَا بِأَطْعِمَةٍ فَلَمْ يُؤْتَ إِلاَّ بِسَوِيقٍ فَأَكَلُوا وَشَرِبُوا ثُمَّ دَعَا بِمَاءٍ فَمَضْمَضَ فَاهُ ثُمَّ قَامَ فَصَلَّى بِنَا الْمَغْرِبَ ‏.‏