'Swear' in the Bible

"Again you have heard that it was said to the {people of old}, 'Do not swear falsely, but fulfill your oaths to the Lord.'

But I say to you, do not swear at all, either by heaven, because it is the throne of God,

And do not swear by your head, because you are not able to make one hair white or black.

Then he began to curse and to swear with an oath, "I do not know the man!" And immediately a rooster crowed.

And he began to curse and to swear with an oath, "I do not know this man whom you are talking about!"

And to whom did he swear [they would] not enter into his rest, except those who were disobedient?

For [when] God made a promise to Abraham, since he had no one greater to swear by, he swore by himself,

For people swear by what is greater [than themselves], and the oath for confirmation [is the] end of all dispute for them.

Now above all, my brothers, do not swear either by heaven or by earth or by any other oath, but let your yes be yes and your no, no, in order that you may not fall under judgment.