Jami` at-Tirmidhi 186

جامع الترمذي#186Sahih

Abu Hurairah narrated that :the Prophet said: "Whoever catches a Rak'ah of Subh before the sun has risen, then he has caught Subh. Whoever catches a Rak'ah of Asr before the sun has set, then he has caught Asr

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

Bashar Awad MaaroufHasan Sahih

Zubair Ali ZaiSahih - Agreed Upon

In-book reference: 2:38

All of Jami` at-Tirmidhi