Mukhtasar Bukhari

Narrated from Sayyiduna Suwaid bin Nu'man (may Allah be pleased with him) that in the year of (the conquest of) Khaybar, he went along with the Messenger of Allah (peace and blessings of Allah be upon him), until when they reached (the place) Sahba, which was very close to Khaybar, the Prophet (peace and blessings of Allah be upon him) performed the 'Asr prayer and then asked for food (breakfast). The companions (may Allah be pleased with them) brought only sattu (barley flour) to the Prophet (peace and blessings of Allah be upon him). He ordered it to be mixed with water, then the Messenger of Allah (peace and blessings of Allah be upon him) and all of us ate it. After that, the Prophet (peace and blessings of Allah be upon him) stood up to perform the Maghrib prayer and (only) rinsed his mouth, and we (also only) rinsed our mouths and performed the prayer, and did not perform ablution (again).

Narrated from Ummul Momineen Maimunah (may Allah be pleased with her) that (once) the Prophet Muhammad (peace be upon him) ate the meat of (a goat's) shoulder at her place, then offered prayer and did not perform ablution.