'Swear an Oath' in the Bible

Then the priest will make her swear an oath, and he will say to the woman, "If a man has not slept with you, and if you have not had an impurity affair under your husband, go unpunished from the waters of bitterness that brings this curse.

the priest will make the woman swear an oath of the sworn oath of the curse, the priest will say to the woman, "May Yahweh give you a curse and a sworn oath in the midst of your people with Yahweh making your hip fall away and your stomach swollen;

If a man vow a vow unto the LORD, or swear an oath to bind his soul with a bond; he shall not break his word, he shall do according to all that proceedeth out of his mouth.