It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him), he says: When the situation became intense during the Battle of the Trench, the Messenger of Allah (peace and blessings be upon him) said: Is there anyone who can inform us about the condition of Banu Qurayza? Sayyiduna Zubair (may Allah be pleased with him) went and informed about their condition. Then, when the situation became even more severe, the Prophet (peace and blessings be upon him) said the same thing three times, (and each time Sayyiduna Zubair (may Allah be pleased with him) responded). So the Messenger of Allah (peace and blessings be upon him) said: Surely, every prophet has a disciple, and my disciple is Zubair.