Revelation 3:2-4

Young's Literal Translation

² become watching, and strengthen the rest of the things that are about to die, for I have not found thy works fulfilled before God.

³ `Remember, then, how thou hast received, and heard, and be keeping, and reform: if, then, thou mayest not watch, I will come upon thee as a thief, and thou mayest not know what hour I will come upon thee.

⁴ Thou hast a few names even in Sardis who did not defile their garments, and they shall walk with me in white, because they are worthy.