Sahih Bukhari Volume 005, Book 059, Hadith Number 703.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 59. Military Expeditions Led by the Prophet (PBUH) (Al-Maghaazi)
Narrated By Ibn Umar : When the Prophet passed by Al-Hijr, he said, "Do not enter the dwelling places of those people who were unjust to themselves unless you enter in a weeping state lest the same calamity as of theirs should befall you." Then he covered his head and made his speed fast till he crossed the valley.