'Swear' in the Bible

but I tell you, don't swear at all: neither by heaven, for it is the throne of God;

Neither shall you swear by your head, for you can't make one hair white or black.

Then he began to curse and to swear, "I don't know the man!" Immediately the rooster crowed.

But he began to curse, and to swear, "I don't know this man of whom you speak!"

To whom did he swear that they wouldn't enter into his rest, but to those who were disobedient?

For when God made a promise to Abraham, since he could swear by none greater, he swore by himself,

For men indeed swear by a greater one, and in every dispute of theirs the oath is final for confirmation.

But above all things, my brothers, don't swear, neither by heaven, nor by the earth, nor by any other oath; but let your "yes" be "yes," and your "no," "no;" so that you don't fall into hypocrisy.