Narrated Ibn Mas`ud:
A man kissed a woman (unlawfully) and then went to the Prophet (ﷺ) and informed him. Allah revealed: And offer prayers perfectly At the two ends of the day And in some hours of the night (i.e. the five compulsory prayers). Verily! good deeds remove (annul) the evil deeds (small sins) (11.114). The man asked Allah's Messenger, "Is it for me?" He said, "It is for all my followers."
'Abdullah reported that a person came to Allah's Messenger (ﷺ) and said: Allah's Messenger, I sported with a woman in the outskirts of Medina, and I have committed an offence short of fornication. Here I am (before you), kindly deliver verdict about me which you deem fit. Unar said: Allah concealed your fault. You had better conceal it yourself also. Allah's Messenger (ﷺ), however, gave no reply to him. The man stood up and went away and Allah's Messenger (ﷺ) sent a person after him to call him and be recited this verse:" And observe prayer at the ends of the day and in the first hours of the night. Surely, good deeds take away evil deeds. That is a reminder for the mindful" (xi. 115). A person amongst the people said: Allah's Messenger, does it concern this marn only? Thereupon he (the Holy Prophet) said: No, but the people at large.