The Comma Johanneum

For those looking for more information on 1 John 5:7-8 as mentioned in my sermon today, you can go to a quick easy reference here:
https://bible.org/article/textual-problem-1-john-57-8

Here is an excerpt from the website:
"This longer reading is found only in eight late manuscripts, four of which have the words in a marginal note.  Most of these manuscripts (2318, 221, and [with minor variations] 61, 88, 429, 629, 636, and 918) originate from the 16th century; the earliest manuscript, codex 221 (10th century), includes the reading in a marginal note which was added sometime after the original composition. Thus, there is no sure evidence of this reading in any Greek manuscript until the 1500s; each such reading was apparently composed after Erasmus’ Greek NT was published in 1516."