Sayyiduna Abu al-Yasar (may Allah be pleased with him) says that the Prophet (peace and blessings be upon him) said: "Whoever would love Allah Almighty to grant him shade on the day when there will be no shade, let him give respite to one in difficulty, or waive part of his debt." The hadith of Sayyiduna Abu Qatadah (may Allah be pleased with him) has already passed, that the Prophet (peace and blessings be upon him) said: "Whoever wishes that Allah Almighty remove from him the hardships of the Day of Resurrection, let him give respite to one in difficulty or waive his debt."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11134