Sahih Muslim 1557
Sahih Muslim · Book 22: The Book of Musaqah · It is recommended to waive debts
A'isha (Allah be pleased with her) reported:
وَحَدَّثَنِي غَيْرُ، وَاحِدٍ ، مِنْ أَصْحَابِنَا قَالُوا حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبِي أُوَيْسٍ ، حَدَّثَنِي أَخِي ، عَنْ سُلَيْمَانَ، - وَهُوَ ابْنُ بِلاَلٍ - عَنْ يَحْيَى بْنِ سَعِيدٍ ، عَنْ أَبِي الرِّجَالِ، مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ أَنَّ أُمَّهُ، عَمْرَةَ بِنْتَ عَبْدِ الرَّحْمَنِ قَالَتْ سَمِعْتُ عَائِشَةَ ، تَقُولُ سَمِعَ رَسُولُ اللَّهِ صلى الله عليه وسلم صَوْتَ خُصُومٍ بِالْبَابِ عَالِيَةً أَصْوَاتُهُمَا وَإِذَا أَحَدُهُمَا يَسْتَوْضِعُ الآخَرَ وَيَسْتَرْفِقُهُ فِي شَىْءٍ وَهُوَ يَقُولُ وَاللَّهِ لاَ أَفْعَلُ . فَخَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَيْهِمَا فَقَالَ " أَيْنَ الْمُتَأَلِّي عَلَى اللَّهِ لاَ يَفْعَلُ الْمَعْرُوفَ " . قَالَ أَنَا يَا رَسُولَ اللَّهِ فَلَهُ أَىُّ ذَلِكَ أَحَبَّ .
Allah's Messenger (ﷺ) heard the voices of altercation of two disputants at the door; both the voices were quite loud. The one demanded some remission and desired that the other one should show leniency to him, whereupon the (other one) was saying: By Allah will not do that. Then there came Allah's Messenger (ﷺ) to them and said: Where is he who swears by Allah that he would not do good? He said: Massenger of Allah, it is I. He may do as he desires.