Sahih al-Bukhari 2909
صحيح البخاري#2909SahihNarrated Abu Umama:Some people conquered many countries and their swords were decorated neither with gold nor silver, but they were decorated with leather, lead and iron
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 56:122