Q. 99
What is required in the third commandment?
A.
That we should not blaspheme or abuse the name of God by cursing, perjury, or unnecessary oaths, nor share in such horrible sins by being silent bystanders. In summary, we should use the holy name of God only with fear and reverence, so that we may rightly confess him, call upon him, and praise him in all our words and works.
Scripture Leviticus 24:10-17 · Matthew 5:33-37 · James 5:12 · Psalm 99:1-5
Q. 100
Is the blaspheming of God's name by swearing and cursing such a grievous sin that God is angry also with those who do not prevent and forbid it as much as they can?
A.
Certainly, for no sin is greater or provokes God's wrath more than the blaspheming of his name. That is why he commanded it to be punished with death.
Scripture Leviticus 5:1 · Leviticus 24:15-16