'Fall Away' in the Bible

then the priest shall cause the woman to swear with the oath of cursing, and the priest shall say unto the woman, Jehovah make thee a curse and an oath among thy people, when Jehovah doth make thy thigh to fall away, and thy body to swell;

and this water that causeth the curse shall go into thy bowels, and make thy body to swell, and thy thigh to fall away. And the woman shall say, Amen, Amen.

And when he hath made her drink the water, then it shall come to pass, if she be defiled, and have committed a trespass against her husband, that the water that causeth the curse shall enter into her and become bitter, and her body shall swell, and her thigh shall fall away: and the woman shall be a curse among her people.

He will rededicate to Yahweh the days of his separation and bring a ram-lamb {in its first year} as a guilt offering. The former days [of his vow] will fall away because his separation was defiled.