Sayyidah Umm Hani (may Allah be pleased with her) said that in the year of the Conquest, the Messenger of Allah (peace and blessings be upon him) prayed eight rak'ahs in her house in a single garment whose two ends he had crossed over each other.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5504
Sayyiduna al-Bara' bin Azib (may Allah be pleased with him) said: I made eighteen journeys with the Prophet (peace and blessings be upon him), and I never saw him (peace and blessings be upon him) leave the two rak'ahs before Zuhr.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5505
Abdullah bin Abbas (may Allah be pleased with them both) said that the Sunnah of the Messenger of Allah (peace and blessings be upon him) is this: "The prayer of travel is two rak'ahs, and in residence four rak'ahs. Just as there is prayer before and after the prayer of residence, so too there is prayer before and after the prayer of travel."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5506