786. Narrated Ibn ‘Abbaas (radhi Allaahu anhu) :
Allaah’s Messenger (Sallallaahu Alaihi Wasallam) asked an Ansaari woman, “What prevented you from performing Hajj with us?” She replied, “We have a camel and the father of so-and-so and his son (i.e. her husband and her son) rode it and left one camel for us to use for irrigation.” He said (to her), “Perform ‘Umra when Ramadaan comes, for ‘Umra in Ramadaan is equal to Hajj (in reward)” or said something similar.
[Saheeh Al-Bukhaari, Hadeeth No. 10, Vol. 3]
The Book Of Hajj : Chapter 36 – The superiority of performing ‘Umra in Ramadaan. Al-Lulu Wal-Marjan, Compiled by : Fuwad Abdul-Baqi, Translated by : Dr. Muhammad Muhsin Khan
389. Narrated Aboo Huraira (radhi Allaahu anhu) : I heard Allaah’s Messenger (Sallallaahu Alaihi Wasallam) saying,
“If there was a river at the door of anyone of you and he took a bath in it five times a day, would you notice any dirt on him?” They said, “Not a trace of dirt would be left.” The Prophet (Sallallaahu Alaihi Wasallam) added, “That is the example of the five Salaat (prayers) with which Allaah blots our (annuls) evil deeds.”
[Saheeh Al-Bukhaari, Hadeeth No. 506, Vol. 1]
Source :The Book of Mosques and places of worship – Chapter 51 – Going (to the mosque) for As-Salaat (the prayer) blots out (annuls) evil deeds and raises the reward in degrees. Al-Lulu Wal-Marjan, Compiled by : Fuwad Abdul-Baqi, Translated by : Dr. Muhammad Muhsin Khan