Musannaf Ibn Abi Shayba 27:528

'Abd al-Rahim ibn Sulayman narrated to us, from Hisham ibn 'Urwah, from 'Urwah, who said: The first man to unsheathe a sword for the sake of Allah was al-Zubayr. He heard a blast [of news] that the Messenger of Allah, may Allah bless him and grant him peace, had been taken. So al-Zubayr went out, cutting through the people with his sword, while the Messenger of Allah, may Allah bless him and grant him peace, was at the highest part of Mecca. He said: "What is the matter with you, O Zubayr?" He said: "I was informed that you had been taken." He said: "So he prayed for him and invoked blessings upon him and his sword."