Sunan an-Nasa'i 866
سنن النسائي#866SahihIt was narrated from Abu Hurairah that the Prophet (ﷺ) said:"When the Iqamah for prayer is said, there is no prayer except the prescribed prayer
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
In-book reference: 10:90