Also known as the Bodhisattva Vow. Chanted at the beginning of Zen meditation periods.

The many beings are numberless -- I vow to save them.
Greed, hatred and folly rise endlessly -- I vow to abandon them.
Dharma gates are countless -- I vow to wake to them.
Buddha's way is unsurpassable -- I vow to embody it fully.
and in Romanji Japanese...
Su-jo mu-hen sei gan do
Bon-no mu-jin sei gan dan
Ho-mon muryo sei gan gakku
Butsu-do mu-gen sei gan jo

The person doing the chanting is vowing not to leave the cycle of reincarnation until all other beings have been led to enlightenment, an endeavor that could take countless kalpas.