Roman Catechism 23.27

Chapter 23 — Part III: The Decalogue — Introduction on the Commandments in General

Section 27. Before they went down into Egypt He sent before them one by whose prudence they and the Egyptians were rescued from famine. In Egypt such was His kindness towards them that although opposed by the power of Pharaoh who sought their destruction, they increased to an extraordinary degree; and when they were severely harassed and cruelly treated as slaves, God raised up Moses as a leader to lead them out in a strong hand. It is especially this deliverance that the Lord refers to in the opening words of the Law: I am the Lord thy God who brought thee out of the land of Egypt, out of the house of bondage.