Hafs bin Asim (may Allah have mercy on him) says that Sayyiduna Ibn Umar (may Allah be pleased with them both) narrated to us that I have accompanied the Prophet Muhammad (peace and blessings be upon him), and I never saw him offering Sunnah prayers during travel, and Allah, the Exalted, has said: "Indeed, in the Messenger of Allah (peace and blessings be upon him) you have a good example." (__QUR_33:21__)
Hadith Referenceاللؤلؤ والمرجان / كتاب صلاة المسافرين وقصرها / 399
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 18 كتاب تقصير الصلاة: 11 باب من لم يتطوع في السفر دبر الصلاة وقبلها»