عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مَطْلُ الْغَنِيِّ ظُلْمٌ وَإِذَا أُحِلْتَ عَلَى مَلِيءٍ فَاتَّبِعْهُ وَلَا بَيْعَتَيْنِ فِي وَاحِدَةٍ
Narrated by Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: Delaying the repayment of a debt by a wealthy person is injustice, and when you are referred to a wealthy person (for payment), then accept the referral, and there are not two transactions in one transaction.