Sayyiduna Abu al-Yasar (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever gives respite to someone in hardship or forgives his debt, Allah will shade him in His shade on the Day when there is no shade but His shade."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16429