This question already has an answer here:

What is the source for the requirement to cover one's arm when falling during tachanun? Also, what should one do if he has short sleeves?

marked as duplicate by Gershon Gold, sabbahillel, Double AA Jun 23 '17 at 1:39

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Browse other questions tagged .