GOD'S WORD® Translation
I alone am the one who comforts you. Why, then, are you afraid of mortals, who must die, of humans, who are like grass?

American Standard Version
I, even I, am he that comforteth you: who art thou, that thou art afraid of man that shall die, and of the son of man that shall be made as grass;

Berean Study Bible
“I, even I, am He who comforts you. Why should you be afraid of mortal man, of a son of man who withers like grass?

Douay-Rheims Bible
I, I myself will comfort you: who art thou, that thou shouldst be afraid of a mortal man, and of the son of man, who shall wither away like grass?

English Revised Version
I, even I, am he that comforteth you: who art thou, that thou art afraid of man that shall die, and of the son of man which shall be made as grass;

King James Bible
I, even I, am he that comforteth you: who art thou, that thou shouldest be afraid of a man that shall die, and of the son of man which shall be made as grass;

World English Bible
"I, even I, am he who comforts you: who are you, that you are afraid of man who shall die, and of the son of man who shall be made as grass;

Young's Literal Translation
I -- I am He -- your comforter, Who art thou -- and thou art afraid of man? he dieth! And of the son of man -- grass he is made!

Isaiah 51:12 Additional Translations ...