Prayer (Kitab Al-Salat): Detailed Rules of Law about the Prayer during Journey
Dawud :: Book 4 : Hadith 1208
Narrated Abdullah ibn Umar:
Abdullah ibn Waqid said: The mu'adhdhin of Ibn Umar said: prayer (i.e. the time of prayer has come). He said: Go ahead. He then alighted before the disappearance. He then offered the night prayer. He then said: When the Apostle of Allah (peace_be_upon_him) was in a hurry about something, he would do as I did. Then he travelled and covered a distance of three days' journey on the day.