'Oath' in the Bible

The men said to her, “We shall be free from this oath to you which you have made us swear,

But if you tell this business of ours, then we shall be free from the oath which you have made us swear.”

Then Joshua made them take an oath at that time, saying, “Cursed before the Lord is the man who rises up and builds this city Jericho; with the loss of his firstborn he shall lay its foundation, and with the loss of his youngest son he shall set up its gates.”

Joshua made peace with them and made a covenant with them, to let them live; and the leaders of the congregation swore an oath to them.

This we will do to them, even let them live, so that wrath will not be upon us for the oath which we swore to them.”