If someone by mistake didn't say atah y'ztarteh (the special tefillah we say by musaf on Shabbos that is also rosh chodesh) and instead davened a regular musaf on shabbos rosh chdoesh, what's the din ...
Does anyone know the history of how "Useshuvah Usefillah Utzedakah maavirin es roah hagezeirah" was put into our Tefillah and/or who wrote it? (It's in the chazaras hashatz for musaf on Rosh Hashana ...
Why is so much emphasis given to the line "us'shuva us'fila utz'daka maavirin..." in the Rosh Hashana and Yom Kipur prayers? It seems to be the most emphasized line of all, with people shouting it and ...