כִּ֤י זֶ֨ה ׀ אֱלֹהִ֣ים אֱ֭לֹהֵינוּ עוֹלָ֣ם וָעֶ֑ד ה֖וּא יְנַהֲגֵ֣נוּ עַל־מֽוּת׃
因為這位上帝是我們的上帝，直到永永遠遠；祂必引導我們，好像引導幼兒一樣。
Rashi
as in youth Heb. על-מות, as a man who leads his young son slowly. Menachem (p. 133) interpreted it as an expression of eternity, and so is its interpretation: will lead us to eternity.