In The Eastern Confession of the Christian Faith (Constantinople, January 1631) issued by Cyril Lucaris, the Patriarch of Constantinople, notwithstanding channelling Calvinistic theological concepts (which would be condemned at the 1672 Eastern Orthodox Synod of Jerusalem), affirmed baptismal regeneration:
CHAPTER XVI.
We
believe that Baptism is a Mystery instituted by the Lord, which, except any one
receive, he hath no communion with Christ, from whose death, burial, and
glorious resurrection, flow all the virtue and efficacy of Baptism; wherefore,
as to those that are so baptised, as is commanded in the Gospel, we doubt not
that their sins are forgiven, whether hereditary, or any such as the baptised
hath committed; so that those that are wished in the Name of the Father, and of
the Son, and of the Holy Spirit, are regenerated, cleansed, and justified. But
concerning a second reception of Baptism we have no commandment, so as to
reiterate Baptism. Therefore we ought to refrain from this irregularity. (J.N.W.B.
Robertson, The Acts and Decrees of The Synod of Jerusalem Sometimes Called
The Council of Bethlehem Holden Under Dositheus, Patriarch of Jerusalem in 1672
[London: Thomas Baker, 1899], 202)
Further Reading on Baptismal Regeneration
Robert S. Boylan, "By Water and of the Spirit": The Biblical Evidence for Baptismal Regeneration (if one wants a PDF copy, email me at ScripturalMormonismATgmailDOTcom)