כִּֽי־כְאִשָּׁ֧ה עֲזוּבָ֛ה וַעֲצ֥וּבַת ר֖וּחַ קְרָאָ֣ךְ יְהוָ֑ה וְאֵ֧שֶׁת נְעוּרִ֛ים כִּ֥י תִמָּאֵ֖ס אָמַ֥ר אֱלֹהָֽיִךְ׃
For the LORD hath called thee As a wife forsaken and grieved in spirit; And a wife of youth, can she be rejected? Saith thy God.
Read kabbalistic (mystical) interpretation of Isaiah 54:6: and classical mystical sources.