Is then the profaning of God's name, by swearing and cursing, so heinous a sin...

Is then the profaning of God's name, by swearing and cursing, so heinous a sin, that his wrath is kindled against those who do not endeavour, as much as in them lies, to prevent and forbid such cursing and swearing?

It undoubtedly is, (a) for there is no sin greater or more provoking to God, than the profaning of his name; and therefore he has commanded this sin to be punished with death. (b)

(a) Prov.29:24 Whoso is partner with a thief hateth his own soul: he heareth cursing, and bewrayeth it not. Lev.5:1 And if a soul sin, and hear the voice of swearing, and is a witness, whether he hath seen or known of it; if he do not utter it, then he shall bear his iniquity. (b) Lev.24:15 And thou shalt speak unto the children of Israel, saying, Whosoever curseth his God shall bear his sin. Lev.24:16 And he that blasphemeth the name of the LORD, he shall surely be put to death, and all the congregation shall certainly stone him: as well the stranger, as he that is born in the land, when he blasphemeth the name of the LORD, shall be put to death.