الفلاتر
Ar-Ruhaybaani , may Allah have mercy upon him, said. “If people, who number forty or more, in a certain city performed the Thuhr prayer instead of the Friday prayer and the due time of the Friday prayer has not elapsed yet, their Thuhr prayer is invalid because they have done what they were not enjoined to do just like someone praying the ‘Asr prayer in the time of Thuhr.” https://www.islamweb.net/en/fatwa/18804/?Option=FatwaId
