Riyad as-Salihin 1049
Jundub bin Sufyan (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "He who offers the dawn (Fajr) prayers will come under the Protection of Allah. O son of Adam! Beware, lest Allah should call you to account in any respect from (for withdrawing) His Protection." [Muslim] .
وعن جندب بن سفيان رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم‏:‏ ‏
"‏من صلى الصبح فهو في ذمة الله فانظر يابن آدم، لا يطلبنك الله من ذمته بشيء‏"‏‏.‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏