Riyad as-SalihinChapter 17Hadith 901
Full Sharh — Riyad as-Salihin 901
وعنه أن رسول الله صلى الله عليه وسلم ، قال: " لا تناجشوا" ((متفق عليه)).
English Translation
Abu Hurairah (May Allah be pleased with him) said:: The Messenger of Allah (ﷺ) said, "Do not practise Najsh (to cheat).".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of the Prohibited actions
Hadith Number
901