Unetanneh Tokef  or  Un'taneh Tokef  (ונתנה תוקף) ("  Let us speak of the awesomeness  ") is a piyyut that has been a part of the Rosh Hashanah and Yom Kippur liturgy in rabbinical Judaism for centuries. It is chanted while the Torah ark is open and the congregants are standing.

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Let us now relate the power of this day's holiness, for it is awesome and frightening. On it Your Kingship will be exalted; Your throne will be firmed with kindness and You will sit upon it in truth. It is true that You alone are the One Who judges, proves, knows, and bears witness; Who writes and seals, Who counts and Who calculates. You will remember all that was forgotten. You will open the Book of Remembrances — it will read itself – and each person's signature is there. And the great shofar will be sounded and a still, thin voice will be heard. Angels will hasten, a trembling and terror will seize them — and they will say, 'Behold, it is the Day of Judgment, to muster the heavenly host for judgment!' — for even they are not guiltless in Your eyes in judgment.

All mankind will pass before You like a flock of sheep. Like a shepherd pasturing his flock, making sheep pass under his staff, so shall You cause to pass, count, calculate, and consider the soul of all the living; and You shall apportion the destinies of all Your creatures and inscribe their verdict.

On Rosh Hashanah will be inscribed and on Yom Kippur will be sealed – how many will pass from the earth and how many will be created; who will live and who will die; who will die at his predestined time and who before his time; who by water and who by fire, who by sword and who by beast, who by famine and who by thirst, who by upheaval and who by plague, who by strangling and who by stoning. Who will rest and who will wander, who will live in harmony and who will be harried, who will enjoy tranquility and who will suffer, who will be impoverished and who will be enriched, who will be degraded and who will be exalted. But Repentance, Prayer, and Charity annul the severe Decree.

For Your Name signifies Your praise: hard to anger and easy to appease, for You do not wish the death of one deserving death, but that he repent from his way and live. Until the day of his death You await him; if he repents You will accept him immediately. It is true that You are their Creator and You know their inclination, for they are flesh and blood. A man's origin is from dust and his destiny is back to dust, at risk of his life he earns his bread; he is likened to a broken shard, withering grass, a fading flower, a passing shade, a dissipating cloud, a blowing wind, flying dust, and a fleeting dream.

But You are the King, the Living and Enduring God.

There is no set span to Your years and there is no end to the length of Your days. It is impossible to estimate the angelic chariots of Your glory and it is forbidden to pronounce Your Name. Your Name is worthy of You and You are worthy of Your Name, and You have included Your Name in our name.


Booklet Section: Seeking Forgiveness 
Source: https://en.wikipedia.org/wiki/Unetanneh_Tokef