Ibn Humayd - Jarir - Mughirah - Ziyad b. Kulayb:
Umar Ibn al-Khattab came to the house of Ali. Talha and Zubair and some of the immigrants were also in the house. Umar cried out: "By God, either you come out to render the oath of allegiance, or I will set the house on fire." al-Zubair came out with his sword drawn. As he stumbled (upon something), the sword fell from his hand so they jumped over him and seized him."
Sunni References: History of al-Tabari, Volume 9 page: 186- 187