“(Wrongdoing) is when a rich man takes a long time to repay a debt, and if one of you is referred to a rich man (to collect a debt), he should accept that referral.” (Using translation from Ibn Mājah 2403)
وَقَالَ رَسُولُ اللهِ ﷺ الْمَطْلُ ظُلْمُ الْغَنِيِّ وَإِذَا أُتْبِعَ أَحَدُكُمْ عَلَى مَلِيءٍ فَلْيَتْبَعْ