Q. 114. What reasons are annexed to the third commandment?

A.
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]

[617] Exodus 20:7. Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain.
[618] Leviticus 19:12. And ye shall not swear by my name falsely, neither shalt thou profane the name of thy God: I am the LORD.
[619] Ezekiel 36:21-23. But I had pity for mine holy name, which the house of Israel had profaned among the heathen, whither they went. Therefore say unto the house of Israel, Thus saith the Lord GOD; I do not this for your sakes, O house of Israel, but for mine holy name's sake, which ye have profaned among the heathen, whither ye went. And I will sanctify my great name, which was profaned among the heathen, which ye have profaned in the midst of them; and the heathen shall know that I am the LORD, saith the Lord GOD, when I shall be sanctified in you before their eyes.
Deuteronomy 28:58-59. If thou wilt not observe to do all the words of this law that are written in this book, that thou mayest fear this glorious and fearful name, THE LORD THY GOD; Then the LORD will make thy plagues wonderful, and the plagues of thy seed, even great plagues, and of long continuance, and sore sicknesses, and of long continuance.
Zechariah 5:2-4. And he said unto me, What seest thou? And I answered, I see a flying roll; the length thereof is twenty cubits, and the breadth thereof ten cubits. Then said he unto me, This is the curse that goeth forth over the face of the whole earth: for every one that stealeth shall be cut off as on this side according to it; and every one that sweareth shall be cut off as on that side according to it. I will bring it forth, saith the LORD of hosts, and it shall enter into the house of the thief, and into the house of him that sweareth falsely by my name: and it shall remain in the midst of his house, and shall consume it with the timber thereof and the stones thereof.
[620] 1 Samuel 2:12, 17, 22, 24. Now the sons of Eli were sons of Belial; they knew not the LORD.... Wherefore the sin of the young men was very great before the LORD: for men abhorred the offering of the LORD.... Now Eli was very old, and heard all that his sons did unto all Israel; and how they lay with the women that assembled at the door of the tabernacle of the congregation.... Nay, my sons; for it is no good report that I hear: ye make the Lord's people to transgress.