Westminster Larger Catechism

The reasons annexed to the third commandment, in these words, The Lord thy God, and, For the Lord will not hold him guiltless that taketh his name in vain,⁶¹⁷ are, because he is the Lord and our God, therefore his name is not to be profaned, or any way abused by us;⁶¹⁸ especially because he will be so far from acquitting and sparing the transgressors of this commandment, as that he will not suffer them to escape his righteous judgment;⁶¹⁹ albeit many such escape the censures and punishments of men.⁶²⁰