What happened to the spear given to Prophet Muhammad (saw) by Az-Zubair after `Uthman was martyred?
 Narrated `Urwa:                     Az-Zubair said, "I met Ubaida bin Sa`id bin Al-As on the day (of the battle) of Badr and he was covered with armor; so much that only his eyes were visible. He was surnamed Abu Dhat-al-Karish. He said (proudly), 'I am Abu-al-Karish.' I attacked him with the spear and pierced his eye and he died. I put my foot over his body to pull (that spear) out, but even then I had to use a great force to take it out as its both ends were bent." `Urwa said, "Later on Allah's Apostle asked Az-Zubair for the spear and he gave it to him. When Allah's Apostle died, Az-Zubair took it back. After that Abu Bakr demanded it and he gave it to him, and when Abu Bakr died, Az-Zubair took it back. `Umar then demanded it from him and he gave it to him. When `Umar died, Az-Zubair took it back, and then `Uthman demanded it from him and he gave it to him. When `Uthman was martyred, the spear remained with `Ali's offspring. Then `Abdullah bin Az-Zubair demanded it back, and it remained with him till he was martyred.