Sunan Ibn Majah 780
سنن ابن ماجه#780SahihIt was narrated that Sahl bin Sa'd As-Sa'idi said:"The Messenger of Allah said: 'Give glad tidings, to those who walk to the mosques in the dark, of perfect light on the Day of Resurrection
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
Shuaib Al ArnautHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 4:46