ISB ~ Revelation 22 v18 - 19

A warning not to tamper with the Book of Revelation, whose contents were carefully dictated by heavenly visions (1:11). Strictly speaking, this is not a general warning against tampering with the Bible, though that, too, is certainly wrong. Moreover, it does not exclude the possibility that there may be Christian revelation outside the books of Scripture, such as in unwritten traditions handed down by the apostles (1 Cor 11:2; 2 Thess 2:15).

• Moses used similar words to caution Israel against adding or subtracting from the Book of Deuteronomy (Deut 4:2).