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