וְהֵ֗מָּה לְ֭שׁוֹאָה יְבַקְשׁ֣וּ נַפְשִׁ֑י יָ֝בֹ֗אוּ בְּֽתַחְתִּיּ֥וֹת הָאָֽרֶץ׃
But those that seek my soul, to destroy it, Shall go into the nethermost parts of the earth.
Read kabbalistic (mystical) interpretation of Psalms 63:10: and classical mystical sources.