וְאִם־שְׁלָ֨שׁ־אֵ֔לֶּה לֹ֥א יַעֲשֶׂ֖ה לָ֑הּ וְיָצְאָ֥ה חִנָּ֖ם אֵ֥ין כָּֽסֶף׃ (ס)
And if he do not these three unto her, then shall she go out for nothing, without money.
Read kabbalistic (mystical) interpretation of Exodus 21:11: and classical mystical sources.