Sahih al-Bukhari, Hadith 2288 ⓘ
Narrated Abu Huraira: The Prophet 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."
حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، حَدَّثَنَا سُفْيَانُ، عَنِ ابْنِ ذَكْوَانَ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَطْلُ الْغَنِيِّ ظُلْمٌ، وَمَنْ أُتْبِعَ عَلَى مَلِيٍّ فَلْيَتَّبِعْ " .
also referenced under: Book 38, Hadith 2 (In-Book) & Volume 3, Book 37, Hadith 487 (USC-MSA)