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.

And ye shall not swear by my name falsely, neither shalt thou profane the name of thy God: I am the LORD.

But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation.

And thou shalt swear, The LORD liveth, in truth, in judgment, and in righteousness; and the nations shall bless themselves in him, and in him shall they glory.

This we will do to them; we will even let them live, lest wrath be upon us, because of the oath which we sware unto them.

And the men said unto her, We will be blameless of this thine oath which thou hast made us swear.

Now therefore, I pray you, swear unto me by the LORD, since I have shewed you kindness, that ye will also shew kindness unto my father’s house, and give me a true token:

Lest I be full, and deny thee, and say, Who is the LORD? or lest I be poor, and steal, and take the name of my God in vain.

Thou shalt fear the LORD thy God; him shalt thou serve, and to him shalt thou cleave, and swear by his name.

Moreover I call God for a record upon my soul, that to spare you I came not as yet unto Corinth.

Now therefore hold him not guiltless: for thou art a wise man, and knowest what thou oughtest to do unto him; but his hoar head bring thou down to the grave with blood.