Birkat haMinim
The Birkat ha-Minim (Hebrew ברכת המינים "Blessing on the heretics") is a Jewish prayer of blessing on heretics in general, and sometimes Christians, though in this context "blessing" may also be a euphemism for a curse. The blessing is the 12th of the Eighteen Benedictions or Amidah.
The writing of the benediction is attributed to Shmuel ha-Katan at the supposed Council of Jamnia which was inserted in the "Eighteen Benedictions" as the 19th blessing in the silent prayer to be said thrice daily, the Amidah. The benediction is thus seen as related to the Pharisees, the Development of the Hebrew Bible canon, the split of early Christianity and Judaism as heresy in Judaism, the origins of Rabbinic Judaism, Origins of Christianity, Christianity in the 1st century, and history of early Christianity.
According to one theory, the Blessing was useful as a tool for outing minim ("heretics"), because no min would recite aloud or reply amen to it, as it was a curse upon minim.
