Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
64/6. Chapter:
The number of the warriors of Badr
Sahih Bukhari
حَدَّثَنَا مُسْلِمٌ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ، قَالَ اسْتُصْغِرْتُ أَنَا وَابْنُ، عُمَرَ.
Narrated Al-Bara: I and Ibn `Umar were considered too young to take part in the battle of Badr.
Reference : Sahih al-Bukhari 3955In-book reference : Book 64, Hadith 7USC-MSA web (English) reference : Vol. 5, Book 59, Hadith 291