Hadithcore
Sahih al-Bukhari, 4087
sahih

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.‏

References2 variants
In-Book Reference
Book 64, Hadith 131
USC-MSA web (English) reference
Vol. 5, Book 59, Hadith 413 (deprecated numbering scheme)