Counting of the Omer (or Sefirat Ha'omer, Hebrew: ספירת העומר, literally, "Counting of the Sheaves") is a verbal counting of each of the forty-nine days between the Jewish holidays of Passover and Shavuot. This mitzvah derives from the Torah commandment to count forty-nine days beginning from the day on which the Omer, a measure of barley, was offered in the Temple in Jerusalem, up until the day before an offering of wheat was brought to the Temple on Shavuot. The Counting of the Omer begins on the second day of Passover and ends the day before the holiday of Shavuot.