Hadith 932
Narrated Wail ibn Hujr: When the Messenger of Allah ﷺ recited the verse "Nor of those who go astray" (Surah al-Fatihah, verse 7), he would say Amin; and raised his voice (while uttering this word).
Hadith 933
Wail b, hujr said that he prayed behind the Messenger of Allah ﷺ, and he said Amin loudly and saluted at his right and left sides until I saw the whiteness of his cheek.