Fool and Knave! Hebrews 1 in Codex Vaticanus
http://www.thetextofthegospels.com/2017/06/fool-and-knave-hebrews-1-in-codex.html?m=1
Made somewhat famous by Bruce Metzger in his 1981 book Manuscripts of the Greek New Testament: An Introduction to Palaeography, this note was written by someone who had discovered that someone had corrected an erroneous reading. The copyist of Codex Vaticanus had written Φανερων in Hebrews 1:3, and a corrector had replaced that with the correct reading, Φέρων (which is supported by all other manuscripts, including Papyrus 46). The person who wrote this note, however, objected to this correction, and wrote, ἀμαθέστατε καὶ κακέ, ἂφες τὸν παλαιόν, μὴ μεταποίει. Metzger translated these words as, “Fool and knave, can’t you leave the old reading alone, and not alter it!” Another rendering: “Untrained troublemaker, forgive the ancient [reading]; do not convert it.” He re-wrote Φανερων, erasing most of the corrector’s Φερων. Apparently, the note-writer regarded Codex Vaticanus as a museum-piece to be protected and preserved, rather than as a copy of Scripture to be used as such.