Bishr bin Harb says that I asked Sayyiduna Ibn Umar (may Allah be pleased with them) that O Abu Abdur Rahman! How is the prayer of a traveler? He replied: If you act upon the Sunnah of the Prophet (peace be upon him), I will tell you; if not, then I will not tell you. We said: O Abu Abdur Rahman! The best way is indeed the Sunnah of our Prophet (peace be upon him). He said: When the Prophet (peace be upon him) would leave this city, he would not pray more than two rak'ahs until he returned.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 6063
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف بشر بن حرب.