Something very easy that few people do that would wipe away 2500 sins a day (combined with one other act)!
On the authority of 'Abdullaah ibn 'Amr ibn al-'Aas (may Allaah be pleased with him and his father), the Messenger of Allaah (sallallaahu 'alayhe wa sallam) said:
"There are two traits that no Muslim servant guards over except that he will enter Paradise (by way of them) - Nay, they are so easy, yet those who do them are few - :
- (1) Glorifying Allaah (saying "Subhaan Allaah") after each prayer ten times, praising Him (saying "al-Hamdulillaah") ten times, and declaring His Greatness (saying "Allaahu akbar") ten times - that is 150 on the tongue and 1500 in the Scale -
- (2) Declaring Allaah's Greatness (saying "Allaahu akbar") 34 times when laying down, praising Him (saying "al-Hamdulillaah") 33 times, and glorifying Him (saying "subhaan Allaah") 33 times - that is 100 on the tongue and 1000 in the Scale -
And which one of you does 2500 bad deeds in one day?!"
Collected by Ahmad, the four compilers of the Sunan, and others.
Al-Albaanee called it "saheeh" in Saheeh al-Jaami' (#3230).