Unetanneh Tokef

Untanneh Tokef, Unthanneh Toqeph, Un'taneh Tokef, or Unsanneh Tokef   (ונתנה תקף) ("Let us speak of the awesomeness ") is a piyyut that has been a part of the Rosh Hashanah and Yom Kippur liturgy in some traditions of rabbinical Judaism for centuries. It introduces the Kedusha of Musaf for these days. It is chanted while the Torah ark is open and the congregants are standing. It is the "central poem of the High Holy Day [of the Day of Atonement]." The ArtScroll machzor calls it "one of the most stirring compositions in the entire liturgy of the Days of Awe."