Philo Judaeus De Migratione Abrahami 92

[92] Nor does it follow, because the feast is the symbol of the joy of the soul and of its gratitude towards God, that we are to repudiate the assemblies ordained at the periodical seasons of the year; nor because the rite of circumcision is an emblem of the excision of pleasures and of all the passions, and of the destruction of that impious opinion, according to which the mind has imagined itself to be by itself competent to produce offspring, does it follow that we are to annul the law which has been enacted about circumcision. Since we shall neglect the laws about the due observance of the ceremonies in the temple, and numbers of others too, if we exclude all figurative interpretation and attend only to those things which are expressly ordained in plain words.