אֲשֶׁ֥ר לֹא־מוֹתְתַ֖נִי מֵרָ֑חֶם וַתְּהִי־לִ֤י אִמִּי֙ קִבְרִ֔י וְרַחְמָ֖הֿ הֲרַ֥ת עוֹלָֽם׃
Because He slew me not from the womb; And so my mother would have been my grave, And her womb always great.
Read kabbalistic (mystical) interpretation of Jeremiah 20:17: and classical mystical sources.