Birkat Hamazon or Birkat Hammazon, known in English as the Grace After Meals , is a set of Hebrew blessings that Jewish Halakha ("collective body of Jewish religious laws") prescribes following a meal that includes at least a ke-zayit (olive sized) piece of bread or matzoh made from one or all of wheat, barley, rye, oats, spelt. It is a mitzvah de-'oraita (Aramaic: דאורייתא), that is written in the Torah (Deuteronomy 8:10). It is a matter of rabbinic dispute whether birkat hamazon must be said a