It is narrated from Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the Imam says Ameen, you should also say Ameen! Whoever's Ameen coincides with the Ameen of the angels, all his previous (minor) sins are forgiven."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 213
Hadith Takhrijأخرجہ البخاری، الاذان، باب جہر الامام بالتأمین: 780 - ومسلم، الصلاۃ، باب التسمیع والتحمید والتأمین: 401۔
It is narrated from Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the Imam says ﴿غير المغضوب عليهم ولا الضالين﴾, then you should say Ameen! Whoever's Ameen coincides with the Ameen of the angels, all his previous (minor) sins are forgiven."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 214
Hadith Takhrijأخرجہ البخاری، الأذان، باب جہر المأموم بالتأمین: 782 - ومسلم، الصلاۃ، باب التسمیع والتحمید والتأمین: 409۔
It is narrated from Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you says Ameen, the angels in the heavens also say Ameen, and whoever's Ameen coincides with the Ameen of the angels, all his previous (minor) sins are forgiven."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 215
Hadith Takhrijاخرجه البخاری: الاذان، باب فضل التامین: 781 - ومسلم، الصلاة، باب التسمیع والتحمید والتامین: 410۔
It is narrated from Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the Imam says Ameen, you should also say Ameen. Whoever's Ameen coincides with the Ameen of the angels, all his previous sins are forgiven." Ibn Shihab Zuhri (may Allah have mercy on him) says that the Messenger of Allah (peace and blessings be upon him) used to say Ameen.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 216
Hadith Takhrijأخرجہ البخاری، الاذان، باب جہر الامام بالتأمین: 780 - ومسلم، الصلاۃ، باب التسمیع والتحمید والتأمین: 401۔
It is narrated from Ata (may Allah have mercy on him) that he states: I heard from the imams appointed by Abdullah bin Zubair (may Allah be pleased with them both) and the imams after them that they would say Ameen, and their followers would also say Ameen, to the extent that the mosque would resound.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 217
It is narrated from Ata (may Allah have mercy on him) who states: I heard the Imams and mentioned Ibn Zubair (may Allah be pleased with them both) and the era after him, that the (Imam) would say Ameen and their followers would also say Ameen, to the extent that the mosque would resound.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 218