Nicene and Ante-Nicene Fathers, Ser. II, Vol I: The Church History of Eusebius.: Chapter III
Chapter III.—Cyprian, and the Bishops with him, first taught that it was necessary to purify by Baptism those converted from Heresy.
First of all, Cyprian, pastor of the parish of Carthage, 2170 maintained that they should not be received except they had been purified from their error by baptism. But Stephen considering it unnecessary to add any innovation contrary to the tradition which had been held from the beginning, was very indignant at this. 2171
From 247 or 248 to 258, when he suffered martyrdom.
294:2171
See the previous chapter, note 3.