It was narrated from Miqdad bin 'Amr:
That he went out one day to Al-Baqi', which is the graveyard, to relieve himself. People used to go out to relieve themselves only every two or three days, and their faces was like that of a camel (because of hunger and rough food). Then he entered a ruin and while he was squatting to relieve himself, he saw a rat bringing a Dinar out of a hole, then it went in and brought out another, until it had brought out seventeen Dinars. Then it brought out a piece of red rag.Miqdad said: “I picked up the rag and found another Dinar inside it, thus completing eighteen Dinar. I took them out and brought them to the Messenger of Allah ﷺ, and told him what had happened. I said, 'Take its Sadaqah (charity), O Messenger of Allah ﷺ.' He said: 'Take them back, for no Sadaqah is due on them. May Allah (Subhanahu-wa-Taala) bless them for you.' Then he said: 'Perhaps you put your hand in the hole?' I said: 'No, by the One Who has honored you with the truth.”

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ خَالِدِ بْنِ عَثْمَةَ، حَدَّثَنِي مُوسَى بْنُ يَعْقُوبَ الزَّمْعِيُّ، حَدَّثَتْنِي عَمَّتِي، قُرَيْبَةُ بِنْتُ عَبْدِ اللَّهِ أَنَّ أُمَّهَا، كَرِيمَةَ بِنْتَ الْمِقْدَادِ بْنِ عَمْرٍو أَخْبَرَتْهَا عَنْ ضُبَاعَةَ بِنْتِ الزُّبَيْرِ، عَنِ الْمِقْدَادِ بْنِ عَمْرٍو، أَنَّهُ خَرَجَ ذَاتَ يَوْمٍ إِلَى الْبَقِيعِ وَهُوَ الْمَقْبُرَةُ لِحَاجَتِهِ وَكَانَ النَّاسُ لاَ يَذْهَبُ أَحَدُهُمْ فِي حَاجَتِهِ إِلاَّ فِي الْيَوْمَيْنِ وَالثَّلاَثَةِ فَإِنَّمَا يَبْعَرُ كَمَا تَبْعَرُ الإِبِلُ ثُمَّ دَخَلَ خَرِبَةً فَبَيْنَمَا هُوَ جَالِسٌ لِحَاجَتِهِ إِذْ رَأَى جُرَذًا أَخْرَجَ مِنْ جُحْرٍ دِينَارًا ثُمَّ دَخَلَ فَأَخْرَجَ آخَرَ حَتَّى أَخْرَجَ سَبْعَةَ عَشَرَ دِينَارًا ثُمَّ أَخْرَجَ طَرَفَ خِرْقَةٍ حَمْرَاءَ . قَالَ الْمِقْدَادُ فَسَلَلْتُ الْخِرْقَةَ فَوَجَدْتُ فِيهَا دِينَارًا فَتَمَّتْ ثَمَانِيَةَ عَشَرَ دِينَارًا فَخَرَجْتُ بِهَا حَتَّى أَتَيْتُ بِهَا رَسُولَ اللَّهِ ﷺ فَأَخْبَرْتُهُ خَبَرَهَا فَقُلْتُ خُذْ صَدَقَتَهَا يَا رَسُولَ اللَّهِ . قَالَ " ارْجِعْ بِهَا لاَ صَدَقَةَ فِيهَا بَارَكَ اللَّهُ لَكَ فِيهَا " . ثُمَّ قَالَ " لَعَلَّكَ أَتْبَعْتَ يَدَكَ فِي الْجُحْرِ " . قُلْتُ لاَ وَالَّذِي أَكْرَمَكَ بِالْحَقِّ . قَالَ فَلَمْ يَفْنَ آخِرُهَا حَتَّى مَاتَ .