Three groups of sins, classified as (I) idolatry, which included apostasy, (2) adultery or fornication, and (3) murder, were held to exclude the guilty person from sharing in the eucharist until death, that is to say, if he had committed the sin after baptism.
It is good for a man not to touch a woman; a man's relations with his own wife are merely a means of fornication, and marriage and concubinage are indistinguishable as against the kingdom of God, in which there is no marrying or giving in marriage.
In 1543 he quitted Frankfort for a similar position at Leipzig, his contention that it was the duty of the civil magistrate to punish fornication, and his sudden departure, having given offence to the authorities of the former university.
14 we read of false teachers at Pergamum who held the "teaching of Balaam, who taught Balak to cast a stumblingblock before the children of Israel, to eat things sacrificed to idols, and to commit fornication."
They had to avoid idolatry, sorcery, avarice, falsehood, fornication, &c.; above all, they were not allowed to kill any living being (the ten commandments of Mani).