Sahih Bukhari | Volume 5 | Hadith Number 506
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.