Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: On the occasion of the Battle of Uhud, I was presented before the Prophet Muhammad (peace be upon him). I was fourteen years old and had not yet reached puberty, so the Prophet (peace be upon him) did not accept me. Then, on the occasion of the Battle of Khandaq, I was presented again; at that time I was fifteen years old, so the Prophet (peace be upon him) accepted me.