hand motion during the prayer

:sl:

I just want to apologize for those of u who think that im asking too many questions
to be honest with u guys, the main reason I joined this forum was to expand my knowledge of Islam
I didn’t come here to waste my time nor urs
I have questions that I require answers
plz don’t mind them. Just answer as honestly as u can (with confirmation of course, if u can :) )
I came to the point where I want proofs instead of just me following wat the sheikh or other ppl tell me to follow
so, with that put away, I got another question
my question is: is it required for us muslims to do the hand motion during the tashahud position?
the sheikh at my masjid said that the reason we raise our shahada finger up and down is to hit the shaitaan
is it true? Can anyone find a hadeeth that says we can do that

jazakumallahu khairun :D