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. Translation Not Available

Book Ref: Sahih Bukhari Book 64 Hadith 3955
Web Ref:  Sahih Bukhari Vol 5 Book 59 Hadith 291