Sunan Ibn Majah 2418
It was narrated from Buraidah Al-Aslami that the Prophet (ﷺ) said:
“Whoever gives respite  to one in difficulty, he will have (the reward of) an act of charity for each day. Whoever gives him respite after payment becomes due, will have (the reward of) an act of charity equal to (the amount of the loan) for each day.”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، عَنْ نُفَيْعٍ أَبِي دَاوُدَ، عَنْ بُرَيْدَةَ الأَسْلَمِيِّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏
"‏ مَنْ أَنْظَرَ مُعْسِرًا كَانَ لَهُ بِكُلِّ يَوْمٍ صَدَقَةٌ وَمَنْ أَنْظَرَهُ بَعْدَ حِلِّهِ كَانَ لَهُ مِثْلُهُ فِي كُلِّ يَوْمٍ صَدَقَةٌ ‏"‏ ‏.‏