Narrated Abdullah ibn Abbas:

A man seized his debtor who owed ten dinars to him. He said to him: I swear by Allah, I shall not leave you until you pay off (my debt) to me or bring a surety. The Prophet ﷺ stood as a surety for him.

He then brought as much (money) as he promised. The Prophet ﷺ asked: From where did you acquire this gold? He replied: From a mine. He said: We have no need of it; there is no good in it. Then the Messenger of Allah ﷺ paid (the debt) on his behalf.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، - يَعْنِي ابْنَ مُحَمَّدٍ - عَنْ عَمْرٍو، - يَعْنِي ابْنَ أَبِي عَمْرٍو - عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَجُلاً، لَزِمَ غَرِيمًا لَهُ بِعَشْرَةِ دَنَانِيرَ فَقَالَ وَاللَّهِ لاَ أُفَارِقُكَ حَتَّى تَقْضِيَنِي أَوْ تَأْتِيَنِي بِحَمِيلٍ فَتَحَمَّلَ بِهَا النَّبِيُّ ﷺ فَأَتَاهُ بِقَدْرِ مَا وَعَدَهُ فَقَالَ لَهُ النَّبِيُّ ﷺ " مِنْ أَيْنَ أَصَبْتَ هَذَا الذَّهَبَ " . قَالَ مِنْ مَعْدِنٍ . قَالَ " لاَ حَاجَةَ لَنَا فِيهَا وَلَيْسَ فِيهَا خَيْرٌ " . فَقَضَاهَا عَنْهُ رَسُولُ اللَّهِ ﷺ .