Clinton E. Arnold's Acts: Volume 2B [2016] p.125, Link:
The synagogue of the Alexandrians is mentioned a number of times in rabbinic literature. A passage in a Jewish Tosephta speaks of a rabbi purchasing the 'synagogue of the Alexandrians.'
References??
This other Thread is five years old. What is the evidence the Hypsistarians existed long before c.300 AD?? Re: B. W. Bacon's "The Gospel Paul 'Received'" The American Journal of Theology, Vol. 21, No. 1 (Jan., 1917), p.28:
Were all this evidence disregarded, we still have epigraphic proofs in abundance of liberal Jewish brotherhoods, from Egypt to Bithynia. These brotherhoods, under the name of Hypsistarii, or worshipers of the Most High God (cf. Acts 16:17), bring Jews and Gentiles together in what appear to be churches in everything save the Christian element. Paul, however, has a better method of reconciling universalism with the law than the allegorizing exegesis of Alexandria.