Revelation 14:5

And in their mouth was found no guile: for they are without fault before the throne of God.
— Revelation 14:5, King James Version

In other translations

World English Bible (WEB)

In their mouth was found no lie. They are without fault.

American Standard Version (ASV)

And in their mouth was found no lie: they are without blemish.

Young's Literal Translation (YLT)

and in their mouth there was not found guile, for unblemished are they before the throne of God.