225 – Abū Dāwūd and al-Tirmidhī likewise relate a similar report from Wāʾil b. Ḥujr (1).

— Hadith grading —
Al-Ḥāfiẓ said in al-Talkhīṣ: It was transmitted by al-Tirmidhī, Abū Dāwūd, al-Dāraqutnī (1/335) and Ibn Ḥibbān (5/111) through Sufyān al-Thawrī, from Salamah b. Kuhayl, from Ḥujr b. ʿAnbas, from Wāʾil b. Ḥujr. In Abū Dāwūd’s wording it reads: “and he raised his voice with it.” The chain is sound; al-Dāraqutnī declared it sound, whereas Ibn al-Qaṭṭān faulted it because of Ḥujr b. ʿAnbas, claiming he was unknown. He erred in this, for the man is a known and reliable transmitter—some even say he was a Companion—and Ibn Maʿīn and others rated him trustworthy.

— Points derived from the two hadiths —
1 – Both narrations show that it is prescribed for the imam to say Āmīn after completing al-Fātiḥah and to prolong his voice when saying it. In a report collected by al-Ḥākim (1/357) and al-Bayhaqī (2/46) from Abū Hurayrah, he would pronounce “Āmīn” loud enough for the people in the first row to hear, so that the mosque would tremble.

2 – Note: The author—may Allah have mercy on him—cited only what concerns the imam’s Āmīn and did not mention the congregation’s. Yet al-Bukhārī (780) and Muslim (410) transmit from Abū Hurayrah that the Messenger of Allah ﷺ said, “When the imam says Āmīn, then say Āmīn, for whoever’s Āmīn coincides with the Āmīn of the angels will have his past sins forgiven.” In another wording: “When the imam says, {nor those who are astray}, then say Āmīn; for the angels say Āmīn and the imam says Āmīn, so whoever’s Āmīn coincides…”