The Prophet ﷺ said: The most prevalent kind of usury is going to lengths in talking unjustly against a Muslim's honour. (Using translation from Abū Dāʾūd 4876)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ مِنْ أَرْبَى الرِّبَا الِاسْتِطَالَةُ فِي عِرْضِ الْمُسْلِمِ بِغَيْرِ حَقٍّ