Musnad Ahmad 907:205

Muhammad ibn Abdullah al-Zubayri and Khalaf ibn al-Walid narrated to us, they said: Isra'il narrated to us, from Simak ibn Harb, that he heard Jabir ibn Samurah saying: The Messenger of Allah (peace and blessings of Allah be upon him) said: "This matter will continue to stand, with the Muslims fighting for it, until the Hour is established." Abu Abd al-Rahman said: "This Abu Ahmad al-Zubayri is not from the descendants of al-Zubayr ibn al-Awwam; rather, the name of his grandfather was al-Zubayr."