Bulugh al-Maram, Book 11, Hadith 1315 (English)

’Ali (RAA) narrated that They (the Muslims and the polytheists) engaged in duel combat on the Day of Badr. Related by Al-Bukhari and Abu Dawud reported it as part of a long hadith.

وَعَنْ عَلِيٍّ ‏- رضى الله عنه ‏- { أَنَّهُمْ تَبَارَزُوا يَوْمَ بَدْرٍ } رَوَاهُ اَلْبُخَارِيُّ 1‏.‏ وَأَخْرَجَهُ أَبُو دَاوُدَ مُطَوَّلاً 2‏.‏ ‏1 ‏- صحيح.‏ رواه البخاري ( 3965 )‏.‏ ‏2 ‏- صحيح.‏ رواه أبو داود ( 2665)‏.‏

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also referenced under: Book 11, Hadith 1288 (In-Book)