Sunan Ibn Majah 796
سنن ابن ماجه#796SahihAishah said:"The Messenger of Allah said: 'If the people knew what (reward) there is in the 'Isha' prayer and fajr prayer, they would come even if they had to crawl
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 ArnautSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 4:62