Sahih Bukhari Volume 005, Book 059, Hadith Number 506.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 59. Military Expeditions Led by the Prophet (PBUH) (Al-Maghaazi)
Narrated By Abu Raja : The freed slave of Abu Qilaba, who was with Abu Qilaba in Sham: 'Umar bin 'Abdul 'Aziz consulted the people saying, "What do you think of Qasama." They said, "'It is a right (judgment) which Allah's Apostle and the Caliphs before you acted on." Abu Qilaba was behind 'Umar's bed. 'Anbasa bin Said said, But what about the narration concerning the people of Uraina?" Abu Qilaba said, "Anas bin Malik narrated it to me," and then narrated the whole story.