The Prophet ﷺ said: Delay in payment on the part of one who possesses means makes it lawful to dishonour and punish him. Ibn al-Mubarak said that "dishonour" means that he may be spoken to roughly and "punish" means he may be imprisoned for it.
عَنْ رَسُولِ اللَّهِ ﷺ قَالَ لَىُّ الْوَاجِدِ يُحِلُّ عِرْضَهُ وَعُقُوبَتَهُ قَالَ ابْنُ الْمُبَارَكِ يُحِلُّ عِرْضَهُ يُغَلَّظُ لَهُ وَعُقُوبَتَهُ يُحْبَسُ لَهُ