'Swear' in the Bible

The priest shall cause her to swear, and shall tell the woman, "If no man has lain with you, and if you haven't gone aside to uncleanness, being under your husband, be free from this water of bitterness that brings a curse.

then the priest shall cause the woman to swear with the oath of cursing, and the priest shall tell the woman, "Yahweh make you a curse and an oath among your people, when Yahweh allows your thigh to fall away, and your body to swell;