What are hadiths about reward and sin? Examples of hadiths about reward and sin…
Wābiṣa b. Ma‘bad al-Asadī (ra) narrated that the Messenger of Allah (saw) said, “Moral goodness is that which brings the soul and heart tranquility and sin is that which throws perturbation into the soul and makes the heart flutter, no matter what people may say.” (al-Darimi, al-Buyuʿ, 2)
Abu Hurayra (ra) reported that the Messenger of Allah (saw) said, “If any one of you improve (follows strictly) his Islamic religion then his good deeds will be rewarded ten times to seven hundred times for each good deed and a bad deed will be recorded as it is.” (al-Bukhari, al-Iman, 31)
Mundhir b. Jarīr (ra) narrated from his father that the Messenger of Allah (saw) said, “…He who sets a good precedent in Islam, there is a reward for him for this (act of goodness) and there is a reward for those who act according to it subsequently, without any deduction from any of their rewards; but he who sets in Islam an evil precedent, there is upon him the burden of that, and the burden of those who act upon it subsequently, without any deduction from any of their burden.” (Muslim, al-Zakat, 69)
Abu Dharr (ra) reported that the Messenger of Allah (saw) said to him, “Have consciousness of Allah wherever you are, and follow an evil deed with a good one to wipe it out, and treat people with good behavior.” (al-al-Tirmidhi, al-Birr, 55)
Source: Presidency Of Religious Affairs The Turkey, Islam Through Hadiths