The Prophet ﷺ said, "Procrastination (delay) in paying debts by a wealthy person is injustice. So, if your debt is transferred from your debtor to a rich debtor, you should agree."  

عَنِ النَّبِيِّ ﷺ قَالَ مَطْلُ الْغَنِيِّ ظُلْمٌ وَمَنْ أُتْبِعَ عَلَى مَلِيٍّ فَلْيَتَّبِعْ