Musnad Abu Ya'la al-Mawsili 152:280

Abu Khaythama narrated to us, al-Fadl ibn Dukayn narrated to us, Sharik narrated to us, from al-Rukin, from his father, from Abdullah, who attributed it to the Prophet (ﷺ), he said: "Usury, even if it is much, its end will result in little."