How much later than Abraham was the law given?

Les explains that the law came 500 years after Abraham. He notes that Moses and the children of Israel came to Mount Sinai, where they received the law. The whole nation was put under it, and Les emphasizes that the law was severe, a burden, and a yoke of bondage that Israel could not even bear. He contrasts this with the righteousness of faith. Later, Les points to Galatians, showing that the churches of Galatia were not under law but under grace, because Judaizers were trying to put them under law. He also uses the analogy of Isaac and Ishmael: Hagar and Ishmael stood for the law and the flesh, while Isaac stood for grace and freedom.