NET
5 “Look at the nations and pay attention! You will be shocked and amazed! For I will do something in your lifetime that you will not believe even though you are forewarned.
Darby
5 See ye among the nations, and behold, and wonder marvellously; for [I] work a work in your days, which ye will not believe, though it be declared [to you].
KJV
5 Behold ye among the heathen, and regard, and wonder marvellously: for [I] will work a work in your days, [which] ye will not believe, though it be told [you].