"O Abu Ayyub, we missed the general mobilization, but we have been told that whoever prays in the four Masjids will be forgiven his sins." He said: "O son of my brother! I will tell you of something easier than that. I heard the Messenger of Allah (ﷺ) says: 'Whoever performs Wudu' as commanded and prays as commanded, will be forgiven for his previous actions.' Is it not so, O 'Uqbah?" He said: "Yes."
Sunan an-Nasa'i Book 1, Hadith 145
← Previous Hadith "Shall I not tell you of that by means of which Allah erases sins and raises (people) in status? Doing Wudu' properly even when it is inconvenient, taking a lot of steps to the Masjid, and waiting for one Salah after another. That is the Ribat for you, that is the Ribat for you, that is the Ribat for you."

Isbagh Al-Wudu'

Sunan an-Nasa'i Book 1, Hadith 144 Next Hadith → "I heard Humran bin Aban tell Abu Burdah in the Masjid that he heard 'Uthman narrating that the Messenger of Allah (ﷺ) said: 'Whoever performs Wudu' completely as commanded by Allah, the five daily prayers will be an expiation for whatever comes in between them.'"

Sunan an-Nasa'i Book 1, Hadith 146