Revelation 2:10-11

10Fear none of those things which thou shalt suffer: behold, the devil shall cast some of you into prison, that ye may be tried; and ye shall have tribulation ten days: be thou faithful unto death, and I will give thee a crown of life.

11He that hath an ear, let him hear what the Spirit saith unto the Assemblies; He that overcometh shall not be hurt of the second death.