Aleinu

Aleinu (Hebrew: עָלֵינוּ, "it is our duty") or Aleinu leshabei'ach (" our duty to praise "), meaning "it is upon us or it is our obligation or duty to praise God," is a Jewish prayer found in the siddur, the classical Jewish prayerbook. It is recited at the end of each of the three daily Jewish services. It is also recited following the New Moon blessing and after a circumcision is performed. It is second only to the Kaddish (counting all its forms) as the most frequently recited prayer in current synagogue liturgy.