Jami` at-Tirmidhi 423
جامع الترمذي#423Da'ifAbu Hurairah narrated that:Allah's Messenger (S) said: "Whoever did not pray the two Rak'ah (before) Fajr then let him pray them after the sun has risen
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 ZaiDaif
In-book reference: 2:276