Sunan Ibn Majah 776
سنن ابن ماجه#776SahihIt was narrated from Abu Sa'eed Al-Khudri that :He heard the Messenger of Allah say: 'Shall I not tell you of something by means of which Allah expiates for sins and increases good deeds?' They said: 'Yes, O Messenger of Allah.' He said: 'Performing ablution properly despite difficulties, increasing the number of steps one takes towards the mosque and waiting for the next prayer after prayer
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan Sahih
Muhammad Fouad Abd al-BaqiHasan Sahih
Shuaib Al ArnautHasan
Zubair Ali ZaiHasan
In-book reference: 4:42