REWARDS OF THE CONGREGATIONAL NIGHT AND DAWN PRAYER H 1089 "If people knew what (reward) is in the late evening (isha) prayers, and the dawn (fajr) prayer they would come to them even if they had to crawl..." R 1089 Bukhari and Muslim with a chain up to Abu Hurairah who related that the Messenger of Allah, praise and peace be upon him, said this.
1072 - وعن أبي هريرة رضي الله عنه : أنَّ رَسُول اللهِ صلى الله عليه وآله وسلم ، قَالَ : "وَلَوْ يَعْلَمُونَ مَا في العَتَمَةِ وَالصُّبْحِ لأَتَوْهُمَا وَلَوْ حَبْوَاً" متفقٌ عَلَيهِ . وقد سبق بِطولِهِ .