Q.61:What is the reason annexed to the third commandment?
A. The reason annexed to the third commandment is, that however the breakers of this commandment may escape punishment from men, yet the Lord our God will not suffer them to escape His righteous judgment.
If you do not carefully observe all the words of this law that are written in this book, that you may fear this glorious and awesome name, THE LORD YOUR GOD, “then the LORD will bring upon you and your descendants extraordinary plagues-great and prolonged plagues-and serious and prolonged sicknesses. Deuteronomy 28:58-59