Pilgrimmage (Hajj)
Bukhari :: Book 2 :: Volume 26 :: Hadith 607
Narrated Nafi :
'Abdullah bin 'Umar' said, "Allah's Apostle made his camel sit (i.e. he dismounted) at Al-Batha' in Dhul-Hulaifa and offered the prayer." 'Abdullah bin 'Umar used to do the same.