As part of the Passover seder, Dayenu is a section in which those at the table remember a list of blessings from G-d.

After each blessing is remembered, the group says "Dayenu", which means "[it would have been] enough". The cumulative effect is a feeling of gratitude for all these blessings, many of which we could have survived without, but which are nevertheless appreciated greatly.

One typical version from jewish.com goes like this:

Had God brought us out of Egypt and not divided the sea for us,
Dayenu!

Had God divided the sea and not permitted us to cross on dry land,
Dayenu!

Had God kept us for forty years in the desert and not fed us with manna,
Dayenu!

Had God fed us with manna and not given us the Sabbath,
Dayenu!

Had God given us the Sabbath and not led us to Mount Sinai,
Dayenu!

Had God led us to Mount Sinai and not given us the Torah,
Dayenu!

Had God given us the Torah and not led us into the Land of Israel,
Dayenu!

Had God led us into the Land of Israel and not built for us the Temple,
Dayenu!

Had God built for us the Temple and not sent us prophets of truth,
Dayenu!

Had God sent us prophets of truth and not made us a holy people,
Dayenu!