The Prophet ﷺ said, "Whoever performs ablution and does it well, then prays two units of prayer without letting his mind wander during them, his past sins will be forgiven."
أن النبي ﷺ قال: من توضأ فأحسن وضوءه، ثم صلى ركعتين لا يسهو فيهما، غفر له ما تقدم من ذنبه.
Abu Dawud narrated it (905), Ahmad bin Muhammad bin Hanbal told us, Abdul-Malik bin Amr told us, Hisham (meaning Ibn Saad) told us, from Zayd bin Aslam, from Ata bin Yasar, from Zayd bin Khalid Juhani, and he related the hadith. The hadith is also in Musnad Imam Ahmad (17054). Its chain is sahih, Hakim graded it sahih (1/131) and said, "It is sahih according to the standard of Muslim, and I do not know of any flaw that would weaken it."I say, Hisham bin Saad maintained this chain in this form. Likewise Layth bin Saad narrated it from Zayd bin Aslam in the same way. Abu Ubayd narrated it in Tahur (10) through the route of Hassan bin Abdullah, from Layth bin Saad, with the same wording.Others besides them narrated it from Zayd bin Aslam, from Zayd bin Khalid, and this version is disconnected. This is how Imam Ahmad narrated it (21691) from Siraj, who said, Abdul-Aziz (meaning Darawardi) told us, from Zayd bin Aslam, from Zayd bin Khalid, and he related the hadith.As for what has been narrated from Anas bin Malik, with the wording, "The five prayers, and Friday to Friday, are expiations for what lies between them, so long as major sins are avoided," and he also said, "On Friday there is an hour in which no Muslim man or woman asks Allah for anything good without Him granting it to him," and he also said, "The five prayers are like a flowing river at the door of one of you, in which he bathes five times every day, so what would remain of his filth?" This is daif.Bazzar narrated it (Kashf Astar 1/175, no. 347). In its chain is Zaidah bin Abu Riqad, who is daif, and Ziyad Numayri, about whom there is no harm, a group of Basrans reported from him, and had we known this hadith from anyone other than him, we would have reported it on that person's authority instead. End of quote.Abu Naeem narrated it in Hilyah (9/249–250) from Abdul-Hakeem, from Anas bin Malik, and he related it, and in it, "plus three days." In its chain is Abdul-Hakeem Qasmali, who is daif.