Not a snake. It's a SHOFAR.
An instrument most often made from a ram’s horn, though it can also be made from the horn of a sheep or goat. It makes a trumpet-like sound and is traditionally blown on New Moon, Rosh HaShanah...
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There are many symbolic meanings associated with the shofar and one of the best known has to do with the Akedah, when God asked Abraham to sacrifice Isaac. The story is recounted in Genesis 22:1-24 and culminates with Abraham raising the knife to slay his son only to have God stay his hand and bring his attention to a ram caught in a nearby thicket. Abraham sacrificed the ram instead. Because of this story some midrashim claim that whenever the shofar is blown God will remember Abraham’s willingness to sacrifice his son and will therefore forgive those who hear the shofar’s blasts. In this way, just as the shofar blasts remind us to turn our hearts towards repentance, they also remind God to forgive us for our trespasses.
The shofar is also associated with the idea of crowning God as King on Rosh HaShanah. The breath used by the Tokea to make the sounds of the shofar are also associated with the breathe of life, which God first breathed into Adam upon the creation of humanity.
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The man who blows the shofar is required to be of blameless character and conspicuous devotion; he must blow blasts of different timbre, some deep, some high, some quavering.
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http://en.wikipedia.org/wiki/Shofar
The
shofar is mentioned frequently in the Hebrew Bible, ... The blast of a shofar emanating from the thick cloud on Mount Sinai made the Israelites tremble in awe (Exodus 18, 20).
The shofar was used in to announce holidays (Ps. lxxxi. 4), and the Jubilee year (Lev. 25. 9). The first day of the seventh month is termed "a memorial of blowing" (Lev. 23. 24), or "a day of blowing" (Num. xxix. 1), the shofar. They were for signifying the start of a war (Josh. 6. 4; Judges 3. 27; 7. 16, 20; I Sam. 8. 3). Later, it was also employed in processions (II Sam. 6. 15; I Chron. 15. 28), as musical accompaniment (Ps. 98. 6; comp. ib. xlvii. 5) and eventually it was inserted into the temple orchestra by David (Ps. 150. 3). Note that the 'trumpets' described in Numbers 10 are a different instrument, described by the Hebrew word 'trumpet' not the word for shofar.
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