Namaz er por dua kora niye ekta proshno ache

Assalamu Alaikum bhai ra, apnara kemon achen? Ami ekta bishoy niye confused hoye gechi, tai apnader kache jigges korte chaichi. Farz namaz shesh korar por amra je dua kori, seita ki voice e korte hobe naki chupchap mon e mon e korle hobe? Amar baba bolen voice e kora better, kintu amar ek bhai bollen je chupchap kora sunnah. Ekhon bujhtesi na konta actually thik. Apnader madhye keu ki kono alim er kach theke shune thaklen ba kono authentic source janen? Amra family shoho bujhte chai je ki kora uchit. Inshallah keu jodi shothik information dite paren tahole khub upokar hobe. JazakAllah khair 🤲