Abu Hurairah (May Allah be pleased with him)reported:
The Messenger of Allah ﷺ said, "If they knew the merits of Salat after nightfall ('Isha') and the morning (Fajr) Salat, they would come to them even if they had to crawl to do so."

[Al-Bukhari and Muslim]

This is part of a long Hadith which has already been mentioned. See Hadith No. 1033.

وعن أبي هريرة رضي الله عنه أن رسول الله ﷺ قال:
"ولو يعلمون ما في العتمة والصبح لأتوهما ولو حبوًا" ((متفق عليه)). وقد سبق بطوله.