'Oath' in the Bible

Therefore he promised with an oath to give her whatever she asked.

"Woe to you, blind guides, who say, 'Whoever swears by the temple, it is nothing! But whoever swears by the gold of the temple is bound [by his oath].'

And, 'Whoever swears by the altar, it is nothing! But whoever swears by the gift [that is] on it is bound [by his oath].'

But Jesus was silent. And the high priest said to him, "I put you under oath by the living God, that you tell us if you are the Christ, the Son of God!"

And again he denied [it] with an oath, "I do not know the man!"

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