Revelation 2:8-10

8And to the angel of the assembly in Smyrna write: These things says the first and the last, who became dead, and lived:

9I know thy tribulation and thy poverty; but thou art rich; and the railing of those who say that they themselves are Jews, and are not, but a synagogue of Satan.

10Fear nothing [of] what thou art about to suffer. Behold, the devil is about to cast 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 to thee the crown of life.