Shulchan Aruch (OC 65) says to say "Sh'ma" with the congregation when they say it, and Mishna B'rura 9 there says the same is true of other things recited as a congregation such as "Ashre" and "Alenu"....
The words "Sheheim Mishtachavim Li-Hevel Voryk Umispallelim El Eil Lo-Yoshiya" - Was this originally part of Aleinu and then removed, or was it added later to Aleinu? Why was this done?
Does anyone know the origin of the custom to spit in Aleinu after the words שֶׁהֵם מִשְׁתַּחֲוִים לְהֶבֶל וְלָרִיק? Where did it start? And in which seforim is it mentioned? I have seen in the ...
Why do some count the Omer before Aleinu and some after?
I remember learning that you should say shema and aleynu together with the tzibur. If you're a little behind, do you stop what you're saying and say shema or do you catch up and say it when you're ...