Jami` at-Tirmidhi 231
جامع الترمذي#231SahihWabisah bin Ma'bad narrated:"A man prayed alone behind the row s the Prophet ordered him to repeat the Salat
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 ZaiIsnaad Sahih
In-book reference: 2:83