Heracleon, Commentary on John (fragments)
c. 170 · Greek
Groups: Valentinians
About 48 fragments are quoted, often to refute them, in Origen's Commentary on John. It is the earliest known commentary on a New Testament book.
Where the manuscripts are now
Manuscripts of Origen's Commentary on John, various
Origen, Comm. Jo. books II–XX
Sources
Allan Menzies (ANF vol. 9) 1896. Public domain (Origen's commentary, containing the fragments)