And thus do you find that the exiles are gathered in, only in reward for faith, as it is written (Song of Songs 4:8) "With Me, from Levanon, My bride; With Me from Levanon shall you come (out of exile). You shall look (upon the redemption) merosh amanah" (homiletically: "in the merit of emunah [belief]). (Hoshea 2:22) "And I will betroth you to Me forever … and I will betroth you to Me with emunah."
Not for Torah Study Alone, Not for the Performance
Mekhilta Tractate Vayehi Beshalach 7:28