KJV:
Behold, ye despisers, and wonder, and perish: for I work a work in your days, a work which ye shall in no wise believe, though a man declare it unto you.
NASB:
'BEHOLD, YOU SCOFFERS, AND MARVEL, AND PERISH; FOR I AM ACCOMPLISHING A WORK IN YOUR DAYS, A WORK WHICH YOU WILL NEVER BELIEVE, THOUGH SOMEONE SHOULD DESCRIBE IT TO YOU.'"