Abu Huraira (RadhiAllahu ‘anhu) reported:
The Messenger of Allah (Sallallaahu ‘alaihi wasallam) said: whoever says:
one hundred times a day, his sins will be obliterated even if they are equal to the extent of the foam of the ocean.”
[Al-Bukhari and Muslim].
Here sins mean minor sins and those which do not relate to the rights of people.