Type: supporting argument (off-timeline) · Assessment: weak. At John 7:38 Jesus prefaces "out of his belly shall flow rivers of living water" with "as the scripture hath said" (kathôs eîpen hē graphē), yet no Old-Testament verse reads so. The bare fact is sound. But the interpretation pressed onto it — that Jesus (or the Evangelist) cites, as Scripture, words from no Old-Testament book, evidencing a canon open past the Hebrew Bible — is weak: unlike 1 Corinthians 2:9, no Father or modern scholar proposes a non-canonical writing here at all. The Fathers either read the formula as a free or composite allusion to canonical "living-water" texts (Jerome to Proverbs, others to Isaiah, Ezekiel, Zechariah) or, with Chrysostom, repunctuate so that "as the scripture hath said" attaches to believing, not to a quotation at all · back to timeline · Related arguments: New-Testament quotations with no Old-Testament source — see also the centerpiece Ephesians 5:14, 1 Corinthians 2:9, and Luke 11:49
Here the sub-claim is that John 7:38, citing "Scripture" words with no Old-Testament locus, helps show the apostolic category of "Scripture" reaching beyond the Hebrew canon.
"He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water."
— John 7:38 (KJV). The clause "as the scripture hath said" (kathôs eîpen hē graphē) is a citation formula; the words that follow correspond to no single Old-Testament passage. As one sibling of the cluster headed by Ephesians 5:14, the verse is sometimes enlisted to show that the New Testament cites, as Scripture, material outside any Old-Testament book.1
The Fathers hunted for the source within the canon. Jerome traced the testimony to Proverbs: "Or this testimony is taken from the Proverbs, where it is said, Let thy fountains be dispersed abroad, and rivers of waters in the streets" (Proverbs 5:16) — a placement that squares with his Preface to the Pentateuch, where he files John 7:38 among the Evangelists' citations "from the Old Testament," not among any apocryphon. Cyril of Jerusalem took the formula at face value as a real Old-Testament back-reference — "here he sends you back to the Old Testament" — reading the "rivers of living water" of the Spirit; and Ambrose read the words through the river "proceeding out of the throne of God" of Revelation 22:1 and the fountain of Eden, identifying the water as the Holy Spirit. None reached for an apocryphon; all looked to canonical Scripture.2
Chrysostom dissolved the puzzle by repunctuating. Where most modern Bibles read "as the scripture hath said" with what follows, John Chrysostom read it with what precedes:
"But where does the Scripture say this? No where. What then? We should read, He that believeth in Me, as saith the Scripture, putting the stop here; and then, out of his belly shall flow rivers of living water: the meaning being, that that was a right kind of belief, which was formed on the evidence of Scripture, not of miracles."
On Chrysostom's reading the formula governs believing ("believe… as the Scripture directs"), and "out of his belly shall flow rivers of living water" is Jesus' own promise, not a quotation of anything. The supposed missing source then never existed.3
What holds. The datum is real: "as the scripture hath said" introduces words that match no verbatim Old-Testament text, and interpreters from Jerome onward have had to work to place them.
What is overstated. The inference to a citation outside the Old-Testament canon is the weakest of the cluster, on three counts.
Every proposed source is canonical. Where 1 Corinthians 2:9 at least had a Father (Origen) naming an apocryphon, here no one does. The candidates are all Old-Testament "living-water" texts — Proverbs (Jerome), Zechariah 14:8 ("living waters shall go out from Jerusalem," fittingly at the Feast of Tabernacles, John's setting), Isaiah 58:11, Ezekiel 47:1–12, the water from the wilderness rock (Exodus 17; Psalm 78), Isaiah 12:3. The mainstream of modern Johannine scholarship reads John 7:38 not as a quotation of one verse but as a free, composite allusion to this cluster — "the Scripture" in a summary, thematic sense — fulfilled in Christ. A composite canonical allusion does not reach beyond the canon at all.
The verse may not be a quotation in the first place. Chrysostom's punctuation — attaching "as the Scripture said" to belief rather than to the following words — removes the citation entirely; the "rivers of living water" become Jesus' own promise. And the much-discussed alternative that makes the rivers flow from Christ's belly (the struck-rock typology) likewise turns the line into fulfillment imagery, not a verbatim quote. On either reading there is no missing book to find.
A formula marks a quotation, not a canon-verdict. Even on the maximal reading — a real citation of a real source — introducing words with "as the scripture hath said" no more certifies a wider canon than the New Testament's quoting 1 Enoch (Jude 14–15) or the pagan poets canonizes them. The looseness shows in the citation-practice, not in the table of contents.
What survives. Only the general, modest point shared by the whole cluster: the Evangelist cites Scripture freely and thematically, sometimes without a clean single source. For John 7:38 the best explanations keep the reference inside the canon (a composite "living-water" allusion) or remove the quotation altogether (Chrysostom). As evidence for an open apostolic canon, the verse barely registers.
Weak. That "as the scripture hath said" at John 7:38 introduces words with no verbatim Old-Testament locus is sound; the inference that the New Testament thereby cites a source outside the Old-Testament canon is weak. No Father or scholar proposes a non-canonical writing here: the patristic and modern candidates are all canonical "living-water" texts (Proverbs, Zechariah 14:8, Isaiah, Ezekiel, the wilderness rock), best taken as a free, composite, fulfillment-shaped allusion to "the Scripture" as a whole — and Chrysostom dissolves even that by reading the formula with "believeth," leaving no quotation to source. The verse shows the looseness and typological reach of New-Testament citation, not a wider canon. (The weakest sibling of the cluster headed by Ephesians 5:14.)
John 7:38 (KJV), with the formula "as the scripture hath said" (kathôs eîpen hē graphē) at 7:37–39; the Feast-of-Tabernacles setting frames the water imagery. The verse belongs to the cluster surveyed by Edmon Gallagher, "Epiphanius on Ephesians 5:14" (2017), and weighed at the centerpiece Ephesians 5:14. ↩
Jerome, Preface to the Pentateuch (the Prologue to Genesis, c. 403, trans. Kevin P. Edgecomb), lists "Rivers of living waters shall flow from his belly" among the things the Evangelists and Apostles quote "from the Old Testament which are not found in [the Septuagint] books" — Scripture to be sought in the Hebrew, not an apocryphon. The medieval Catena Aurea on John 7 pins that Prologue's testimony to Proverbs — "this testimony is taken from the Proverbs, where it is said, Let thy fountains be dispersed abroad, and rivers of waters in the streets" (Proverbs 5:16) — though the Prologue's own list names no chapter and verse (whence the uncertainty between Proverbs 5:16 and 18:4). Cyril of Jerusalem, Catechetical Lecture 16.11–12: "as the Scripture has said — here he sends you back to the Old Testament." Ambrose of Milan, On the Holy Spirit 3.20.153–156, reading the water as the Holy Spirit via the river of Revelation 22:1. ↩
John Chrysostom, Homilies on John 51 (as excerpted in the Catena Aurea on John 7): "But where does the Scripture say this? No where. What then? We should read, He that believeth in Me, as saith the Scripture, putting the stop here; and then, out of his belly shall flow rivers of living water." On the modern composite-allusion and struck-rock readings, and the candidate texts (Proverbs 18:4; Zechariah 14:8; Isaiah 58:11; Ezekiel 47:1–12; Psalm 78:15–16; Isaiah 12:3), see the standard Johannine commentaries (Raymond E. Brown, The Gospel According to John [Anchor Bible 29], on 7:37–39; D. A. Carson, The Gospel According to John [Pillar], ad loc.). ↩