score:1
[Khalid] went away, saying, "Nine swords were broken in my hand on the Day of Mu'tah..."
Ṭabarī attributes this account to Qais bin Abi Hazim. If you follow the footnote in Ṭabarī,you may be able to determine the original source.
Upvote:-1
The story about nine broken swords has mentioned in syr aalam alnonlaa by alzahabi in the part of khalid bin alwaleed