Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، سَمِعَ جَابِرًا، يَقُولُ الَّذِي قَتَلَ خُبَيْبًا هُوَ أَبُو سِرْوَعَةَ.Narrated Jabir:The person who killed Khubaib was Abu Sirwa' (i.e. `Uqba bin Al-Harith)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.