Just some observations.
KJV 1 Jonn 5:7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
NASB 1 John 5:7 For there are three that testify:
LSB 1 John 5:7 For there are three that bear witness:
ESV 1 John 5:7 For there are three that testify:
YLT 1 John 5:7 because three are who are testifying in the heaven,
the Father, the Word, and the Holy Spirit, and these--the three--are one;
7.
three. Ge
+*1:26.
bear. ver. 10, 11. Jn 8:13, 14.
the Father. The genuineness of the latter part of this verse, and the first clause of the next, it is well known has divided the opinions of learned men for nearly four centuries, nor is it yet decided. It is certainly wanting in many of the ancient MSS. and versions; and is not quoted by many of the Fathers: but the number of MSS. collated is but small, only about 400; it exists in some ancient confessions of faith and liturgies; is quoted by numerous Latin Fathers; and appears necessary from the connection in which it stands. It also seems more probable that the Arians should silently omit it in their copies, or that it should be left out by mistake, than that the trinitarians should forge and insert it; for the latter would only gain one argument for a doctrine which is abundantly taught in other Scriptures; but if it was admitted as the Word of God, all the ingenuity and diligence of opponents could scarcely avoid the inference naturally deducible from it. Contemporary scholarship, however, fails to support this reading in any form, suggesting it was added to a late Greek manuscript made for the purpose to influence Erasmus to include it in his Greek text, for Erasmus had promised he would include the text if even one Greek manuscript could be found which contained it. Ps 33:6h. Is 48:16, 17. 61:1. Mt *3:16, 17. *17:5. +*28:19n. Jn 5:26. 8:18, 54. 10:37, 38. *12:28. 1 Co 12:4-6. 2 Co *13:14. Re 1:4, 5.
the Word. See on 1 J 1:1. Jn *1:1, 32-34. He *4:12, 13. Re *19:13.
the Holy. See on ver. 6. Mt 3:16. Jn *1:32, 33. Ac 2:4, 33. 5:32. He 2:3, 4. *10:15. Re 19:10.
Ghost. Gr.
pneuma, Mt +3:16.
and these. Dt +*6:4. Mt +
m28:19n. Jn *10:30. 14:9, 11. Ac *5:3, 4. 1 Ti 3:16.
+ + More references at verse indicated
* * Clear cross reference
m m Critical, significant cross reference
three that bear witness. The OT law required "the testimony of two or three witnesses" to establish the truth of a particular matter (Deu_17:6; Deu_19:15; cf. Joh_8:17-18; 1Ti_5:19).
Furthermore, four of those eight manuscripts contain the passage as a variant reading, written in the margin as a later addition to the manuscript. No Greek or Latin Father, even those involved in Trinitarian controversies, quotes them; no ancient version, except the Latin, records them (not the Old Latin in its early form or the Vulgate). Internal evidence also militates against their presence, since they disrupt the sense of the writer's thoughts. Most likely, the words were added much later to the text. There is no verse in Scripture which so explicitly states the obvious reality of the Trinity, although many passages imply it strongly.