Ante-Nicene Fathers, Vol VIII:
Pseudo-Clementine Literature.: Chapter LXIII

p. 94 Chapter LXIII.—Appeal to the Jews.

“Thus we argued and bore witness; and we who were unlearned men and fishermen, taught the priests concerning the one only God of heaven; the Sadducees, concerning the resurrection of the dead; the Samaritans, concerning the sacredness of Jerusalem (not that we entered into their cities, but disputed with them in public); the scribes and Pharisees, concerning the kingdom of heaven; the disciples of John, that they should not suffer John to be a stumbling-block to them; and all the people, that Jesus is the eternal Christ.  At last, however, I warned them, that before we should go forth to the Gentiles, to preach to them the knowledge of God the Father, they should themselves be reconciled to God, receiving His Son; for I showed them that in no way else could they be saved, unless through the grace of the Holy Spirit they hasted to be washed with the baptism of threefold invocation, and received the Eucharist of Christ the Lord, whom alone they ought to believe concerning those things which He taught, that so they might merit to attain eternal salvation; but that otherwise it was utterly impossible for them to be reconciled to God, even if they should kindle a thousand altars and a thousand high altars to Him.”