‏الصلاة : Hadeeth No:814 Abu Harare reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When anyone amongst you utters Amin and the angels In the heaven also utter Amin and (the Amin) of the one synchronises with (that of) the other, all his previous sins are pardoned....

‏فضائل الصحابة‏ : Hadeeth No:6008 Anas reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) went to Umm Aiman and I went along with him and she served him a drink in a vessel and he reported that the narrator said: I do not know whether it was because of the fasting (or for any other reason) that he (the Prophet) refused ...