וְיָ֨סְפָ֜ה פְּלֵיטַ֧ת בֵּית־יְהוּדָ֛ה הַנִּשְׁאָרָ֖ה שֹׁ֣רֶשׁ לְמָ֑טָּה וְעָשָׂ֥ה פְרִ֖י לְמָֽעְלָה׃
And the remnant that is escaped of the house of Judah shall again take root downward, and bear fruit upward.
Read kabbalistic (mystical) interpretation of Isaiah 37:31: and classical mystical sources.