It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "No matter how much usury increases, its end is always towards decrease."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3754
Hadith Gradingحکم دارالسلام:حديث صحيح، شريك وإن كان سيئ الحفظ، متابع.