Schaff, Philip. "Ch. 24: The Didache and the Scriptures." The Oldest Church Manual Called the Teaching of the Twelve Apostles. Second Edition, Revised and Enlarged. New York: Funk & Wagnalls, 1886, 78-95
Schaff summarizes the use made of the Old Testament by New Testament authors, observing that the Apostolic Fathers make freer use of the Apocrypha and that they allude to New Testament passages not being overly concerned with ascription or verbatim accuracy (Schaff 1886, 79). It is with Irenaeus that Schaff considers the habit of quoting exactly and referring to the specirid work quoted (Schaff 1886, 80). With this pattern in mind, Schaff considers the Didache to follow the pattern of the Apostolic Fathers, and to draw heavily on Matthew. Old Testament quotations from Malachi 1:11, 14 appear in Didache 14:3, and from Zechariah 14:5 in Didache 16:7 (Schaff 1886, 80-81). Schaff considers other allusions to be vague.
As to New Testament references, Schaff notes that the Didache appeals to the "Gospel" without seemingly being aware of multiple records (Schaff 1886, 81). Schaff does leave the possibility of this referring to an oral tradition open, though in 8:2 and 15:4 it strikes Schaff as likely that the author refers to a written Gospel (Schaff 1886, 81).
Schaff lays out the parallel passages of Matthew and the Didache in detail, using English versions, but noting the Harnack edition, pages 70 and following, which provide a Greek version (Schaff 1886, 82-86).
Though Schaff details several suggested sources, which contain both Matthean and Lukan materials, he observes that these are later creations and that they contain none of the overall spirit of the Didache.Therefore he does not consider the resemblances more than coincidental (Schaff 1886, 86-87).
A passage of importance as regards the Lukan connection is Did. 16:1, compared with Luke 12:35 (Schaff 1886, 88). Here the Didacheresembles Luke more closely than Matthew. Another close resemblance is found between Didache 4:8 and Acts 4:32 (Schaff 1886, 89).
While many scholars have suggested that the Didache is unaware of John, Schaff finds similarities between Didache 10:2 and John 1:14, as well as Didache 9:2 and John 15:1, Didache 9:2,3; 10:2 and John 15:15, Didache 10:56 and 1 John 2:5, Didache 10:6 and 1 John 2:17, Didache 11:11 and 1 John 4:1, nd Didache 11:2 and 2 John 10 (Schaff 1886, 90-91). Schaff concludes that there was "some acquaintance with our fourth Gospel and the other Johannean writings, or at all events with the Johannean type of teaching" (Schaff 1886, 92).
Schaff continues to identify a few similarities to Pauline teaching, the Epistle to the Hebrews, and to 1 Peter and Jude (Schaff 1886, 93). He concludes this chapter with a comprehensive list of quotations and allusions to the Old Testament, the Old Testament Apocrypha, and the New Testament (Schaff 1886, 94-95).
This chapter will be invaluable in my research, as Schaff provides such a clear catalog of references.