177 AD On 1 John 5:7, here is a screenshot of Athenagoras' Greek words (highlighted in yellow) & English translation of those words (highlighted in green)
"the communion of the Father with the Son, what is the Spirit, what is the unity of these three, the Spirit, the Son, the Father, and their distinction in unity"
English translation link:
https://archive.org/details/writingsofjustin00justuoft/page/388/mode/1up
Screenshot of Athenagoras' Greek words is found in below
👉Link
(Supplicatio pro Christianis, Cap  XI [Chapter 11 in English] Athenagoras) Page 40 out of 119

Athenagoras (who spoke Greek & Latin) refered to 1 John 5:7, in Greek, with words of "what is the unity of these three, the Spirit, the Son, the Father,". Athenagoras' use of Greek words to quote 1 John 5:7 proves 1 John 5:7 existed in both 1st century AD's+2nd century AD's Greek manuscripts & 1 John 5:7 was translated early from Greek into Old Latin & eventually English
Stick with KJB, which preserves 1 John 5:7!
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