It is narrated from Sayyiduna Jabir (may Allah be pleased with him); he said: On the day of the Battle of the Trench, the Messenger of Allah (peace and blessings be upon him) said: "Who will bring us news of Banu Qurayzah?" Then he (peace and blessings be upon him) called on the people a second time, then a third time, and al-Zubayr came forward. The Prophet (peace and blessings be upon him) said: "Every prophet has a disciple, and my disciple is al-Zubayr."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 226