مشكوة المصابيح
Mishkat al-Masabih
كتاب البيوع
The Book of Sales and Trade
(أَدْنَى دَرَجَةِ إِثْمِ السُّودِ)
(The lowest degree of the sin of usury)
Hadith 2826
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الرِّبَا سَبْعُونَ جُزْءًا أيسرها أَن الرجل أمه»
Abu Huraira reported God’s Messenger as saying, "Usury has seventy parts, the least important being that a man should marry his mother.” Ibn Majah and Baihaqi, in Shu'ab al-iman
