בְּנֵֽי־עֲבָדֶ֥יךָ יִשְׁכּ֑וֹנוּ וְ֝זַרְעָ֗ם לְפָנֶ֥יךָ יִכּֽוֹן׃
The children of Thy servants shall dwell securely, And their seed shall be established before Thee.'
Read kabbalistic (mystical) interpretation of Psalms 102:29: and classical mystical sources.