عَن عِمران بنِ حُصَينٍ رَضِيَ اللهُ عَنهُ قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيهِ وَسَلَّم : مَن كَانَ لَهُ عَلَى رَجُلٍ حَقٌّ فَمَن أَخَّرَهُ كَانَ لَهُ بِكُلِّ يَومٍ صَدَقَةٌ. (مسند أحمد رقم 19977)
Hazrat Imraan bin Husayn (Radhiyallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) said: “The one who is owed some money (or any other right), and after the due date he grants respite to the debtor, then for each day (of respite), he will receive the reward of giving (the entire amount owed to him) in sadaqah.”