Yahya bin Abd al-Wahid says: I heard Abu Mujib say that the tip of the scabbard of Abu Hurayrah's (may Allah be pleased with him) sword was made of silver. Abu Dharr (may Allah be pleased with him) forbade him from it and said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever leaves behind silver or gold will be branded with it." Imam Bukhari (may Allah have mercy on him) said: There is some doubt about it (fihi nazar).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7583