بُلُوغُ الْمَرَامِ
Bulugh al-Maram 797
Business Transactions
وَعَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - قَالَ: { نَهَى رَسُولُ اَللَّهِ - صلى الله عليه وسلم -عَنْ بَيْعِ اَلْحَصَاةِ, وَعَنْ بَيْعِ اَلْغَرَرِ } رَوَاهُ مُسْلِمٌ [1] .
Narrated Abu Hurairah (RA): Allah's Messenger (ﷺ) forbade a transaction determined by throwing stones, and the transaction which involves some uncertainty (or cheating). [Reported by Muslim].
Sunnah.com reference: Book 7, Hadith 20