Jami` at-Tirmidhi 2164
جامع الترمذي#2164SahihAbu Hurairah narrated that the Prophet (s.a.w) said:"Whoever prays Subh, then he is under the protection of Allah's covenant, so do not infringe at all upon Allah's covenant
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 33:7