The Spirit-filled Holy Bible repudiates both circumcisional and baptismal regeneration. So too do the uninspired Jewish writings which appeared between the Old and the New Testaments. Thus: the Tanna on Genesis; the early Talmud; Philo; and Josephus. Similarly, so too do all extant documents of the Christian Church which arose during the first two hundred years after Calvary.
It was as late as A.D. 250 when the ritualist Cyprian perhaps unconsciously began to syncretize Christianity and Paganism. Before then, no patristic writings advocated baptismal regeneration. Indeed, even Baptism as such is but little mentioned in the earliest post-apostolic extant evidence.