What the Bible says about the Third Command-- Using God's Name

Using God's name pointlessly

You shall not take the name of Yahweh your God in vain, for Yahweh will not leave him unpunished who takes His name in vain.

 Exodus 20:7

Cursing Yahweh is death

Now the son of an Israelite woman, whose father was an Egyptian, went out among the sons of Israel; and the Israelite woman's son and a man of Israel struggled with each other in the camp. The son of the Israelite woman blasphemed the Name and cursed. So they brought him to Moses. (Now his mother's name was Shelomith, the daughter of Dibri, of the tribe of Dan.) They put him in custody so that the command of the LORD might be made clear to them. Then the LORD spoke to Moses, saying, "Bring the one who has cursed outside the camp, and let all who heard him lay their hands on his head; then let all the congregation stone him. You shall speak to the sons of Israel, saying, 'If anyone curses his God, then he will bear his sin. Moreover, the one who blasphemes the name of the LORD shall surely be put to death; all the congregation shall certainly stone him. The alien as well as the native, when he blasphemes the Name, shall be put to death.”

 Leviticus 24:10-16

Speaking falsely in God's name is death

Now in the same year, in the beginning of the reign of Zedekiah king of Judah, in the fourth year, in the fifth month, Hananiah the son of Azzur, the prophet, who was from Gibeon, spoke to Jeremiah in the house of the LORD in the presence of the priests and all the people, saying, Thus says the LORD of hosts, the God of Israel, 'I have broken the yoke of the king of Babylon. Within two years I am going to bring back to this place all the vessels of the LORD'S house, which Nebuchadnezzar king of Babylon took away from this place and carried to Babylon. And the prophet Jeremiah said, "Amen! May the LORD do so; may the LORD confirm your words which you have prophesied to bring back the vessels of the LORD'S house and all the exiles, from Babylon to this place. Yet hear now this word which I am about to speak in your hearing and in the hearing of all the people! The prophets who were before me and before you from ancient times prophesied against many lands and against great kingdoms, of war and of calamity and of pestilence. The prophet who prophesies of peace, when the word of the prophet comes to pass, then that prophet will be known as one whom the LORD has truly sent." Then Hananiah the prophet took the yoke from the neck of Jeremiah the prophet and broke it. Hananiah spoke in the presence of all the people, saying, "Thus says the LORD, 'Even so will I break within two full years the yoke of Nebuchadnezzar king of Babylon from the neck of all the nations.'" Then the prophet Jeremiah went his way. Then Jeremiah the prophet said to Hananiah the prophet, "Listen now, Hananiah, the LORD has not sent you, and you have made this people trust in a lie. Therefore thus says the LORD, 'Behold, I am about to remove you from the face of the earth. This year you are going to die, because you have counseled rebellion against the LORD.'" So Hananiah the prophet died in the same year in the seventh month.

 Jeremiah 28:1-17

False teachers in God's name bring destruction

False prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves. Many will follow their sensuality, and because of them the way of the truth will be maligned; and in their greed they will exploit you with false words; their judgment from long ago is not idle, and their destruction is not asleep.

 II Peter 2:1-3

Interpreters of God's law must think of God's holiness

Woe to you, blind guides, who say, 'Whoever swears by the temple, that is nothing; but whoever swears by the gold of the temple is obligated.' You fools and blind men! Which is more important, the gold or the temple that sanctified the gold? And, 'Whoever swears by the altar, that is nothing, but whoever swears by the offering on it, he is obligated.' You blind men, which is more important, the offering, or the altar that sanctifies the offering? Therefore, whoever swears by the altar, swears both by the altar and by everything on it. And whoever swears by the temple, swears both by the temple and by Him who dwells within it. And whoever swears by heaven, swears both by the throne of God and by Him who sits upon it.

 Matthew 23:16-22

Blasphemy of the Holy Spirit

The scribes who came down from Jerusalem were saying about Jesus, "He is possessed by Beelzebul," and "He casts out the demons by the ruler of the demons." Jesus replied, "Truly I say to you, all sins shall be forgiven the sons of men, and whatever blasphemies they utter; but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin "— because they were saying, "He has an unclean spirit."

 Mark 3:22, 28-30

False prophets don't act with God's mercy

Either make the tree good and its fruit good, or make the tree bad and its fruit bad; for the tree is known by its fruit. You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart. The good man brings out of his good treasure what is good; and the evil man brings out of his evil treasure what is evil. But I tell you that every careless word that people speak, they shall give an accounting for it in the day of judgment. For by your words you will be justified, and by your words you will be condemned."

 Matthew 12:33-37