That the Prophet ﷺ said: "Procrastination (in paying a debt) by a rich person is oppression. So if your debt is transferred from your debtor to a rich debtor, you should agree." He said: There are narrations on this topic from Ibn 'Umar, and Ash-Sharid bin Suwaid Ath-Thaqafi.  

عَنِ النَّبِيِّ ﷺ قَالَ مَطْلُ الْغَنِيِّ ظُلْمٌ وَإِذَا أُتْبِعَ أَحَدُكُمْ عَلَى مَلِيٍّ فَلْيَتْبَعْ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عُمَرَ وَالشَّرِيدِ بْنِ سُوَيْدٍ الثَّقَفِيِّ  

That the Prophet ﷺ said: "Procrastination (in paying a debt) by a rich person is oppression. So if your debt is transfered from your debtor you should agree, and do not make two sales in one sale."  

عَنِ النَّبِيِّ ﷺ قَالَ مَطْلُ الْغَنِيِّ ظُلْمٌ وَإِذَا أُحِلْتَ عَلَى مَلِيءٍ فَاتْبَعْهُ وَلاَ تَبِعْ بَيْعَتَيْنِ فِي بَيْعَةٍ