Muwatta Imam Malik Book of Business Transactions, Hadith 85

Yahya related to me from Malik from Abu'z-Zinad from al Araj from Abu Hurayra that the Messenger of Allah ﷺ said, "Delay in payment by a rich man is injustice, but when one of you is referred for payment to a wealthy man, let him be referred."

حَدَّثَنَا يَحْيَى، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " مَطْلُ الْغَنِيِّ ظُلْمٌ وَإِذَا أُتْبِعَ أَحَدُكُمْ عَلَى مَلِيءٍ فَلْيَتْبَعْ " .