Transferance of a Debt from One Person to Another (Al-Hawaala)
كتاب الحوالات
(2) Chapter: If somebody's debt are transferred to a rich debtor
باب إِذَا أَحَالَ عَلَى مَلِيٍّ فَلَيْسَ لَهُ رَدٌّ
Narrated Abu Huraira:
The Prophet (ﷺ) 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.”