Narrated Nafi: That Ibn Umar was presented before the Prophet ﷺ on the day of Uhud, when he was fourteen years old, but he did not allow him. He was again presented to him on the day of Khandaq (the battle of Trench) when he was fifteen years old, he allowed him.
Hadith Referenceسنن ابي داود / كتاب الخراج والفيء والإمارة / 2957
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (4097)