'Oath' in the Bible

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

But if you tell [anyone] this business of ours, we shall be blameless and free from the oath which you 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 rebuilds 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.”

This [is what] we will do to them: we will let them live, so that the wrath [of God] does not come upon us for [violating] the oath which we have sworn to them.”