Original sentence: During the celebration, members of the community fast, recite Psalms, and gather in Jerusalem where Ethiopian Rabbis called Kessim read from the Orit.Some see it as a commemoration of the revelation at Mount Sinai however the Kessim have also maintained a tradition of the holiday arising some time in the 15th Century CE as a result of the persecution of Christian Amhara kings
Edited sentence: During the celebration, members of the community fast, recite Psalms, and gather in Jerusalem where Kessim read from the Orit.Some see it as a commemoration of the revelation at Mount Sinai however the Kessim (Ethiopian Rabbis) have also maintained a tradition of the holiday arising some time in the 15th Century CE as a result of the persecution of Christian Amhara kings