Sunan Ibn Majah 428
سنن ابن ماجه#428SahihIt was narrated from Abu Hurairah that:The Prophet said: "Sins are expiated by well-performed ablution 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-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 1:162