Sayyiduna Buraydah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever gives respite to one in hardship will have, for each day, the reward of giving its like in charity." He said: I said: O Messenger of Allah! A charity for each day? Then I said to him: For each day the like of it in charity? He (peace and blessings be upon him) said: "For him there is a charity for each day as long as the debt has not fallen due; and when the debt has fallen due and he then gives him respite, he will have, for each day, the like of it in charity."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10976