Allah's Messenger (ﷺ) said:
Whoever says:
Subḥānallāhi wa biḥamdihi.
one hundred times a day, will have his sins forgiven even if they are like the foam of the sea.
Allah's Messenger (ﷺ) said: Whoever says:
Glorified is Allah and praised is He.
one hundred times a day, will have his sins forgiven even if they are like the foam of the sea.
Reference:
Al-Bukhari 7/168, Muslim 4/2071, see also invocation no. 91 of this book.