بُلُوغُ الْمَرَامِ
Bulugh al-Maram 829
Business Transactions
عَنْ جَابِرٍ - رضى الله عنه - قَالَ: { لَعَنَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -آكِلَ اَلرِّبَا, وَمُوكِلَهُ, وَكَاتِبَهُ, وَشَاهِدَيْهِ, وَقَالَ: هُمْ سَوَاءٌ } رَوَاهُ مُسْلِمٌ [1] .
Narrated Jabir (RA): Allah's Messenger (ﷺ) cursed the one who accepts usury, the one who gives it, the one who records it and the two witnesses to it, saying, "They are all the same." [Reported by Muslim].
Sunnah.com reference: Book 7, Hadith 62