Prayer (Kitab Al-Salat): Detailed Rules of Law about the Prayer during Journey
Dawud :: Book 4 : Hadith 1201
Narrated Anas ibn Malik:
When the Apostle of Allah (peace_be_upon_him) halted at a certain place (while on a journey), he would not leave that place till he offered the noon prayer. A man said to him: Even if in the middle of the day? He replied: Even if in the middle of the day.