(12) باب مَطْلُ الْغَنِيِّ ظُلْمٌ
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "Procrastination (delay) in repaying debts by a wealthy person is injustice."
Reference: Sahih al-Bukhari 2400
In-book reference: Book 43, Hadith 16
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 41, Hadith 585