Sahih al-Bukhari, Volume 5, Book 59, Hadith 413 (USC-MSA) ⓘ
Narrated Jabir: The person who killed Khubaib was Abu Sarua (i.e. `Uqba bin Al-Harith).
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، سَمِعَ جَابِرًا، يَقُولُ الَّذِي قَتَلَ خُبَيْبًا هُوَ أَبُو سِرْوَعَةَ.
also referenced under: Book 64, Hadith 131 (In-Book) & Hadith 4087 (DarusSalam)