Virtue: Hadith No: 796 From: Sunan Ibn Majah. Chapter 6, The Chapters on the Mosques and the Congregations Narrated/Authority of Aisha "The Messenger of Allah (saw) 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.'" (Sahih)
Hadith No: 797 From: Sunan Ibn Majah. Chapter 6, The Chapters on the Mosques and the Congregations Narrated/Authority of Abu Hurairah "The Messenger of Allah (saw) said: 'The most burdensome prayers for the hypocrites are the Isha prayer and the Fajr prayer. If only they knew what (reward) there is in them, they would come to them even if they had to crawl.'" (Sahih)
Hadith No: 867 From: Sahih Bukhari. Chapter 50, Witnesses Narrated/Authority of Abu Huraira Allah's Apostle (SAW) said, "If the people knew what is the reward of making the call (for the prayer) and (of being in) the first row (in the prayer), and if they found no other way to get this privilege except by casting lots, they would certainly cast lots for it. If they knew the reward of the noon prayer, they would race for it, and if they knew the reward of the morning (i.e. Fajr) and Isha prayers, they would present themselves for the prayer even if they had to crawl to reach there.
Reference: Sunan Ibn Majah