[Machine] The Messenger of Allah, ﷺ , forbade the breaking of the Muslims' monetary exchange unless it is necessary to break a dirham, in which case it should be replaced with silver, or to break a dinar, in which case it should be replaced with gold.  

أَنَّ رَسُولَ اللهِ ﷺ نَهَى أَنْ تُكْسَرَ سِكَّةُ الْمُسْلِمِينَ الْجَائِزَةُ بَيْنَهُمْ إِلَّا مِنْ بَأْسٍ أَنْ يُكْسَرَ دِرْهَمٌ فَيُجْعَلَ فِضَّةً أَوْ يُكْسَرَ الدِّينَارُ فَيُجْعَلَ ذَهَبًا