תלמוד על עבודה זרה 53:21

It was stated⁸⁸Babli Avodah zarah 27a, Tosephta Avodah zarah 3:13.: “A Jew may circumcise a Samaritan but a Samaritan may not circumcise a Jew since he circumcises in the name of Mount Gerizim, the words of Rebbi Jehudah. Rebbi Yose said to him, where do we find that circumcision needs intent? Let him continue to circumcise in the name of Mount Gerizim until he dies!”