On the authority of his father, who said: The Messenger of Allah ﷺ forbade to break the coins of the Muslims current among them except for some defect. (Using translation from Abū Dāʾūd 3449)  

نَهَى نَبِيُّ اللهِ ﷺ أَنْ تُكْسَرَ سِكَّةُ الْمُسْلِمِينَ الْجَائِزَةُ بَيْنَهُمْ إِلَّا مِنْ بَأْسٍ