Yahya related to me from Malik from Sumayy, the mawla of AbuBakr, from Abu Salih as-Samman from Abu Hurayra that the Messenger ofAllah, may Allah bless him and grant him peace, said, "When the imamsays, 'Allah hears whoever praises Him,' say 'O Allah! Our Lord,praise be toYou, 'for the previous wrong actions done by the one whoseutterance coincides with that of the angels are forgiven."
App reference: Book 3, Hadith 50
USC-MSA web (English) reference: Book 3, Hadith 50
Arabic reference: Book 3, Hadith 197