مُوَطَّأُ مَالِكٍ
Muwatta Malik 1384
Business Transactions
قَالَ مَالِكٌ عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنِ النَّجْشِ .
Malik said, from Nafi from Abdullah ibn Umar that the Messenger of Allah, (ﷺ), forbade najsh. Malik said, "Najsh is to offer a man more than the worth of his goods when you do not mean to buy them and someone else follows you in bidding."
Arabic/English book reference: Book 31, Hadith 98