Sayyiduna Jabir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) cursed the one who takes usury (riba), the one who pays it, its scribe and those who bear witness to it, and he said: "They are all equal."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10468