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The 1925 statement is quite clear that it's coming from an edited version of the New Hampshire confession(~1833) but past that I can't pin it down.
Have you tried these:

ANABAPTIST CONFESSIONS OF FAITH

Waldenses Confession Of Faith, 1120 And 1544
The Schleitheim Confession, 1527
Discipline Of The Church, 1527
Ridemann's Rechenschaft, 1540
The Dordrecht Confession, 1632
A Declaration Of Several People Called Anabaptists, 1659

ENGLISH BAPTIST-SEPARATIST CONFESSIONS

A True Confession, 1596
Short Confession Of Faith In Xx Articles, 1609
A Short Confession Of Faith, 1610
A Declaration Of Faith Of English People Remaining At Amsterdam, 1611
Propositions And Conclusions Concerning True Christian Religion, 1612-1614

EARLY ENGLISH BAPTIST ASSOCIATIONAL CONFESSIONS

John Spilsbury And His Confession
The First London Baptist Confession Of Faith, 1644
The First London Baptist Confession Of Faith, 1646 Edition
An Appendix To A Confession Of Faith, 1646, Benjamin Cox (Coxe)
The Faith And Practise Of Thirty Congregations, 1651
The True Gospel-Faith Declared According To The Scriptures, 1654
The Midland Confession Of Faith, 1655
The Somerset Confession Of Faith, 1656
Carter Lane Declaration Of Faith, 1757

ENGLISH BAPTIST GENERAL CONFESSIONS

The Standard Confession, 1660
The Assembly Or Second London Confession, 1677 And 1688, Approved 1689
A Short Confession Or A Brief Narrative Of Faith, 1691
The Coalheaver's Confession, 1745
Articles Of Religion Of The New Connexion, 1770

AMERICAN BAPTIST CONFESSIONS

The Philadelphia Confession, 1742
The Sandy Creek Confession, 1758
The Goatyard Declaration Of Faith, 1792
The New Hampshire Baptist Confession Of Faith, 1833
Treatise On The Faith And Practice Of The Free Will Baptists, 1834 And 1948
The Abstract Of Principles, 1858
Articles Of Faith Put Forth By The Baptist Bible Union Of America, 1923
Baptist Faith And Message, 1925
Baptist Faith And Message, 1963 W/Reports Till 2000
Cambridge Declaration, 1998

GENERAL BAPTIST CONFESSIONS

Liberty Association Articles Of Faith (1824)
General Association Articles Of Faith (1870)
General Association Articles Of Faith (1949)
A Short Confession Of Faith, In Twenty Articles, John Smyth

BAPTIST CATECHISMS

A Catechism For Babes, Or Little Ones, 1652
A Short Catechism About Baptism, 1659
Instruction For The Ignorant, Bunyan's Catechism, 1675
Benjamin Keach's Catechism, 1677
The Orthodox Catechism, 1680
A Catechism For Boys And Girls
A Catechism Or Instructions For Children And Youth
The Philadelphia Baptist Catechism
The Baptist Catechism, Charleston Association Catechism, 1813
The Baptist Scriptural Catechism, 1850
A Puritan Catechism, 1855
A Catechism For Little Children, 1864
Compend Of Christian Doctrines Held By Baptists: In Catechism, 186
A Catechism Of Bible Teaching, 1892
A Brief Catechism Of Bible Doctrine

Reformed and Always Reforming,