'Oaths' 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.'

And [although] the king was distressed, because of his oaths and his {dinner guests} he commanded [the request] to be granted.

And [although he] was deeply grieved, the king, because of his oaths and {dinner guests}, did not want to refuse her.