Not graded
Riyad as-Salihin 1580
وعنه أن رسول الله صلى الله عليه وسلم ، قال:
" لا تناجشوا"
Abu Hurairah (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "Do not practise Najsh (to cheat)."
[Muslim].
Cited in Riyad as-Salihin (No. 1580).