Sahih al-Bukhari 2142
Book 34: Sales and Trade · Narrated by Ibn `Umar
Arabic
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ نَهَى النَّبِيُّ صلى الله عليه وسلم عَنِ النَّجْشِ.
English translation
Narrated Ibn `Umar:Allah's Messenger (ﷺ) forbade Najsh
Reference: Sahih al-Bukhari 2142, Book of Sales and Trade. English translation by Dr. Muhammad Muhsin Khan.