Mazel tov is what would be said at a Jewish wedding.
An example of mazel tov is what is said after a Jewish wedding.
Origin of mazel tovClassical Hebrew (language) (often via Yiddish) ; from m?zal, luck + t?v, good
also ma·zal tov
Origin of mazel tovMishnaic Hebrew mazzāl &tlowdot;ôb, good luck : mazzāl, constellation, destiny (ultimately from Akkadian manzaltu, mazzaztum, position of a star, from izuzzu, to stand; see &dlowmac;w&dlowmac;1 in Semitic roots) + &tlowdot;ôb, good; see &tlowdot;yb in Semitic roots.
- Used to express congratulations or good wishes, especially at weddings. (in a Jewish context)
While it literally means “good luck”, it is used more to express congratulations or well wishes retrospectively (at a wedding, after a purchase), rather than prospectively as good luck is often used.