Narrated Abu Huraira:

Allah's Apostle has set forth an example for a miser and a charitable person by comparing them to two men wearing two iron cloaks and their hands are raised to their breasts and necks. Whenever the charitable man tries to give a charitable gift, his iron cloak expands till it becomes so wide that it will cover his fingertips and obliterate his tracks And, whenever the miser wants to give a charitable gift, his cloak becomes very tight over him and every ring gets stuck to its place Abu Huraira added;
I saw Allah's Apostle putting his finger in the (chest) pocket of his shirt like that If you but saw him trying to widen (the opening of his shirt) but it did not widen

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا أَبُو عَامِرٍ، حَدَّثَنَا إِبْرَاهِيمُ بْنُ نَافِعٍ، عَنِ الْحَسَنِ، عَنْ طَاوُسٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ ضَرَبَ رَسُولُ اللَّهِ ﷺ مَثَلَ الْبَخِيلِ وَالْمُتَصَدِّقِ، كَمَثَلِ رَجُلَيْنِ عَلَيْهِمَا جُبَّتَانِ مِنْ حَدِيدٍ، قَدِ اضْطُرَّتْ أَيْدِيهِمَا إِلَى ثُدِيِّهِمَا وَتَرَاقِيهِمَا، فَجَعَلَ الْمُتَصَدِّقُ كُلَّمَا تَصَدَّقَ بِصَدَقَةٍ انْبَسَطَتْ عَنْهُ حَتَّى تَغْشَى أَنَامِلَهُ وَتَعْفُوَ أَثَرَهُ، وَجَعَلَ الْبَخِيلُ كُلَّمَا هَمَّ بِصَدَقَةٍ قَلَصَتْ، وَأَخَذَتْ كُلُّ حَلْقَةٍ بِمَكَانِهَا. قَالَ أَبُو هُرَيْرَةَ فَأَنَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ بِإِصْبَعِهِ هَكَذَا فِي جَيْبِهِ، فَلَوْ رَأَيْتَهُ يُوَسِّعُهَا وَلاَ تَتَوَسَّعُ. تَابَعَهُ ابْنُ طَاوُسٍ عَنْ أَبِيهِ وَأَبُو الزِّنَادِ عَنِ الأَعْرَجِ فِي الْجُبَّتَيْنِ. وَقَالَ حَنْظَلَةُ سَمِعْتُ طَاوُسًا سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ جُبَّتَانِ. وَقَالَ جَعْفَرٌ عَنِ الأَعْرَجِ جُبَّتَانِ.