صحيح مسلم
Sahih Muslim
كتاب المساقاة
The Book of Musaqah
باب تَحْرِيمِ مَطْلِ الْغَنِيِّ وَصِحَّةِ الْحَوَالَةِ وَاسْتِحْبَابِ قَبُولِهَا إِذَا أُحِيلَ عَلَى مَلِيٍّ:
Chapter: The prohibition of a rich man delaying repayment. The validity of Hawalah (Transferal of Debts) and it is recommended to accept transferal of a debt if it is transferred to a rich man
2 hadith
Hadith 1564
Abu Hurairah (RA) reported Allah's Messenger (ﷺ) as saying: Delay (in the payment of debt) on the part of a rich man is injustice, and when one of you is retired to a rich man, he should follow him.
Hadith 1564
A hadith like this has been transmitted on the authority of Abu Huraira (Allah be pleased with him).