The Book of Transactions (Kitab Al-Buyu`)
Muslim :: Book 10 : Hadith 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.