Riyad as-Salihin
Riyad as-Salihin 1581
Prohibition of Deceiving others
Arabic hadith text
وعن ابن عمر رضي الله عنهما، أن النبي صلى الله عليه وسلم نهى عن النَجَش، ((متفق عليه)).
Translation
Ibn 'Umar (May Allah be pleased with them) said
The Messenger of Allah (ﷺ) prohibited the practice of Najsh.[Al-Bukhari and Muslim].