וְאִם־הָפֵ֥ר יָפֵ֛ר אֹתָ֖ם אַחֲרֵ֣י שָׁמְע֑וֹ וְנָשָׂ֖א אֶת־עֲוֺנָֽהּ׃
But if he shall make them null and void after that he hath heard them, then he shall bear her iniquity.
Read kabbalistic (mystical) interpretation of Numbers 30:16: and classical mystical sources.