Revelation 3:1-4 King James Version (KJV)
3 And unto the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead.
2 Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.
3 Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.
4 Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.
Revelation 3:1-4 New International Version (NIV)
To the Church in Sardis
3 “To the angel[a] of the church in Sardis write:
These are the words of him who holds the seven spirits[b] of God and the seven stars. I know your deeds; you have a reputation of being alive, but you are dead. 2 Wake up! Strengthen what remains and is about to die, for I have found your deeds unfinished in the sight of my God. 3 Remember, therefore, what you have received and heard; hold it fast, and repent. But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you.
4 Yet you have a few people in Sardis who have not soiled their clothes. They will walk with me, dressed in white, for they are worthy.