Sunan Abi Dawud 36:2

The tradition mentioned above has also been transmitted by Anas through a different chain of narrators. This version as transmitted by 'Isa b. Yunus adds:

It remained in his hand until he died, in the hand of 'Abu Bakr until he died, in the hand of 'Umar until he died, and in the hand of 'Uthman. When he was near a well, it fell down in it. He ordered to take it out, but it could not be found.