What did 'Uthman (peace be upon him) do in relation to prayers during a journey, as mentioned in the hadith narrated by `Aisha (may Allah be pleased with her)?
 Narrated `Aisha:                     "When the prayers were first enjoined they were of two rak`at each. Later the prayer in a journey was kept as it was but the prayers for non-travelers were completed." Az-Zuhri said, "I asked `Urwa what made Aisha pray the full prayers (in journey)." He replied, "She did the same as `Uthman did."