The Messenger of Allah ﷺ said, "When you hear the call to prayer, repeat what the caller says."
حدثنا محمد بن جعفر غندر حدثنا مالك بن أنس عن الزهري عن عطاء بن يزيد
عن رسول الله ﷺ أنه قال إذا سمعتم النداء فقولوا مثل ما يقول
Its isnad is sahih. Ghundar is the nickname of Muhammad bin Jafar. In [T], it says "Ghundar narrated to us," which is an error. The hadith has already appeared at 2962.