When To Do Sajda-e-Sehaw
The requirement for Sajda-e-Sehaw is for mistake or assumed mistake ( i.e. doubt ) in any of the utterances or rituals of Salah which are fixed in Sharia . Please see for utterances and rituals of Salah fixed in Sharia : Discussion 59404 • Reply 59446 Please see for procedure of Sajda-e-Sehaw : Discussion 62524 ____ Regarding Bismillah , please post it as a separate question.