'Swear' in the Bible

“Again, you have heard that it was said to the men of old, ‘You shall not make false vows, but you shall fulfill your vows to the Lord [as a religious duty].’

Nor shall you make an oath by your head, for you are not able to make a single hair white or black.

But Jesus kept silent. And the high priest said to Him, “I call on You to swear a binding oath by the living God, that you tell us whether You are the Christ, the Son of God.”

Then he began to curse [that is, to invoke God’s judgment on himself] and swear [an oath], “I do not know the man!” And at that moment a rooster crowed.

And to whom did He swear [an oath] that they would not enter His rest, but to those who disobeyed [those who would not listen to His word]?

For when God made the promise to Abraham, He swore [an oath] by Himself, since He had no one greater by whom to swear,

Indeed men swear [an oath] by one greater than themselves, and with them [in all disputes] the oath serves as confirmation [of what has been said] and is an end of the dispute.

But above all, my fellow believers, do not swear, either by heaven or by earth or with any other oath; but let your yes be [a truthful] yes, and your no be [a truthful] no, so that you may not fall under judgment.