عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ رَجُلٍ مِنْ بَنِي سُلَيْمٍ عَنْ جَدِّهِ أَنَّهُ أَتَى النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ بِفِضَّةٍ فَقَالَ هَذِهِ مِنْ مَعْدِنٍ لَنَا فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ سَتَكُونُ مَعَادِنُ يَحْضُرُهَا شِرَارُ النَّاسِ
A man from Banu Sulaym narrates from his grandfather that he brought silver to the Prophet Muhammad (peace be upon him) and said: This is silver from one of our mines. The Prophet (peace be upon him) said: Soon there will be mines, but the worst people will be present at them.