'Oath' in the Bible

The men said to her, "We [will be] released from this oath of yours that you made us swear.

But if you report this business of ours, we will be released from your oath that you made us swear."

And Joshua made peace with them, and {he made a covenant with them} to allow them to live happily, and the leaders of the congregation swore [an oath] to them.

This we will do to them: [we will] let them live so that wrath will not be on us because of the oath we swore to them."