To save from prosecution
Concerning shofar blowing the Kisei Rachamim asks – Why do we blow Tkia- Shvarim- Trua- Tkia - תשר''ת – Because it comes from the word תשורה - -gift – that one brings to a king in order to appease him.
We must know that the Angel appointed over Tkia is Pastam, the Angel appointed over Shvarim is Yehuel and the Angel appointed over Trua is Shamshiel. The Angel appointed over all of them is called Enkatam and he stands before the Heavenly Throne to bring the sounds of the shofar before Him. In the merit of the sounds of the shofar the Honorable King sitting on the Heavenly Throne will come to save His children, the Children of Israel, from prosecutors that surround us on Rosh Hashanah, the Day of Judgment.
Every person is to love one another sincerely and honestly. If all of Israel will do that, we will come to -"אז ימלא שחוק פינו ולשננו רינה" with the initials of the word shofar שופר – and then we will hear the shofar of Mashiach who will come to redeem us, speedily in our days, Amen.
Shabbat Shalom!!
