1 John 5:7

For there are three that bear record in heaven If there is one thing that is certain in textual criticism, it is that this famous passage is not genuine. The Revisers have only performed an imperative duty in excluding it from both text and margin. External and internal evidence are alike overwhelmingly against the passage. A summary of both will be found in Appendix D. But there are three facts, which every one should know, and which alone are enough to shew that the words are an interpolation. (1) They are not found in a single Greek MS. earlier than the fourteenth century. (2) Not one of the Greek or Latin Fathers who conducted the controversies about the doctrine of the Trinity in the third, fourth, and first half of the fifth centuries ever quotes the words. (3) The words occur first towards the end of the fifth century in Latin, and are found in no other language until the fourteenth century. The only words which are genuine in this verse are, For there are three that bear record, or more accurately, For those who bear witness are three: -three" is the predicate; for -witness" see on 1 John 1:2.