כְּמ֤וֹ הָרָה֙ תַּקְרִ֣יב לָלֶ֔דֶת תָּחִ֥יל תִּזְעַ֖ק בַּחֲבָלֶ֑יהָ כֵּ֛ן הָיִ֥ינוּ מִפָּנֶ֖יךָ יְהוָֽה׃
Like as a woman with child, that draweth near the time of her delivery, Is in pain and crieth out in her pangs; So have we been at Thy presence, O LORD.
Read kabbalistic (mystical) interpretation of Isaiah 26:17: and classical mystical sources.