Jami` at-Tirmidhi 421
جامع الترمذي#421SahihAbu Hurairah narrated that:Allah's Messenger (S) said: "When the Iqamah has been called for the Salat then there is no Salat except the obligatory
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 Muslim
In-book reference: 2:274