What are hadiths about cheating? Examples of hadiths about cheating…
According to Abu Hurayra (ra), the Messenger of Allah (saw) said, “… He who deceives us is not one of us.”(M283, Muslim, al-Iman, 164)
According to Abu Bakr al-Siddiq (ra), the Prophet (saw) said, “The swindler, miser, the mannān (one who boasts of the good he does) and the miser will not enter Paradise.” (al-Tirmidhi, al-Birr, 41)
According to al-Hasan (al-Basri), ʿUbayd Allah b. Ziyad (the governor of Basra) went to visit Maʿqil b. Yasar (ra), who was on his deathbed, and Maʿqil said, “Let me tell you a ḥadīth that I heard from the Messenger of Allah (saw). I heard the Prophet (saw) saying, ‘If Allah gives a man authority over someone and he does not look after him in an honest manner, he will never discover even the fragrance of Paradise.’” (al-Bukhari, al-Ahkam, 8)
According to Abu Hurayra (ra), the Prophet (saw) said, “A believer is not stung twice (by something) out of the same hole.” (al-Bukhari, al-Adab, 83)
Anas b. Malik (ra) said, “the Messenger of Allah (saw) said to me, ‘O my son! If you are capable of (waking up in) the morning and (going to sleep in) the evening while there is no deceit in your heart toward anyone, then do so. O my son! That is from my Sunna. Whoever brings to life my Sunna loves me. And whoever loves me will be with me in Paradise.’” (al-Tirmidhi, al-ʿIlm, 16)
Source: Presidency Of Religious Affairs The Turkey, Islam Through Hadiths