'Swear' in the Bible

"Again, you have heard that it was told those who lived long ago, "You must not swear an oath falsely,' but, "You must fulfill your oaths to the Lord.'

But I tell you not to swear at all, neither by heaven, because it is God's throne,

Nor should you swear by your head, because you cannot make one hair white or black.

Then he began to invoke a divine curse and to swear with an oath, "I don't know this man you're talking about!"

And to whom did he swear that they would never enter his rest? It was to those who disobeyed him, was it not?

For when God made his promise to Abraham, he swore an oath by himself, since he had no one greater to swear by.

For people swear by someone greater than themselves, and an oath given as confirmation puts an end to all argument.

Above all, brothers, do not swear oaths by heaven, by earth, or by any other object. Instead, let your "Yes" mean yes and your "No" mean no! Otherwise, you may fall under condemnation.