Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3880
'Abdullah (b. Mas'ud) (Allah be pleased with him) said that Allah's Messenger (may peace be upon him) cursed the one who accepted interest and the one who paid it I asked about the one who recorded it, and two witnesses to it. He (the narrator) said: We narrate what we have heard.