Sunan an-Nasa'i 514
سنن النسائي#514SahihIt was narrated from Abu Hurairah, may Allah be pleased with him, that the Prophet (ﷺ) said:"Whoever catches up with two Rak'ahs of 'Asr prayer before the sun sets, or one Rak'ah of the Subh prayer before the sun rises, has caught it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 6:21