Sahih Bukhari Volume 5, Book 59, Hadith Number 545.

Narrated By Said : Aban bin Said came to the Prophet and greeted him. Abu Huraira said, “O Allah’s Apostle! This (Aban) is the murderer of the Ibn Qauqal.” (On hearing that), Aban said to Abu Huraira, “How strange your saying is! You, a guinea pig, descending from Qadum Dan, blaming me for (killing) a person whom Allah favored (with martyrdom) with my hand, and whom He forbade to degrade me with his hand.”