Revelation 2:10-12 American Standard Version (ASV)
10 Fear not the things which thou art about to suffer: behold, the devil is about to cast some of you into prison, that ye may be tried; [a]and ye shall have [b]tribulation ten days. Be thou faithful unto death, and I will give thee the crown of life. 11 He that hath an ear, let him hear what the Spirit saith to the churches. He that overcometh shall not be hurt of the second death.
12 And to the angel of the church in Pergamum write:
These things saith he that hath the sharp two-edged sword: