رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1581
The Book of the Prohibited actions
Prohibition of Deceiving others
وَعَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا، أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نهى عَنِ النَّجْشِ، ((مُتَّفَقٌ عَلَيْهِ)).
Ibn 'Umar (May Allah be pleased with them) said: The Messenger of Allah (ﷺ) prohibited the practice of Najsh. [Al-Bukhari and Muslim].
Riyad as-Salihin, 1581