The heresies mentioned are those of Simon Magus and Cleobius (this name is given also by Hegesippus), with Gnostics and Ebionites. Against these, Christians must believe in the Trinity, the Scriptures and the Resurrection. The original Law of Moses (specifically the Ten Commandments) is to be observed, along with all the regulations given prior to the incident of the Golden Calf (Exo. 32). But the "Second Law," the regulations given after the incident of the Golden Calf, were given to the Jews on account of the hardness of their hearts (Did. 26). In addition, the Sabbath rest is given a symbolic content, and the Christians are admonished to instead treat every day as belonging to the Lord, but not to keep the rest literally.