Take the 2-minute tour ×  I have seen in many Shuls on Hoshana
Raba after using the Hoshanos people throw the used Hoshanos on
top of the Aron Kodesh. What is the reason and source for this
Minhag?  share|improve this question  1 Answer 1  up vote 6 down
vote accepted  Nitey Gavriel (Sukkos pg. 379 footnote 15) brings
the custom in the name of the Malbushei Yom Tov to Levush 664:4
and Nitzutzei Zohar Parshas Tzav, who explain that it is in
order to leave the sparks of judgment behind at the conclusion
of the days of judgment and not take them back home. The custom
is also brought in the Bikurey Yaakov (S"K 16). The Nitey
Gavriel himself writes that he heard the reason to commemorate
the arovos in the Beis Hamikdosh that they would place on the
mizbeach.  share|improve this answer  Your Answer