The Torah was given by G-d to the Jewish people on Mount Sinai more than 3300 years ago. Every year on the holiday ofShavuot we renew our acceptance of G‑d’s gift, and G‑d “re-gives” the Torah. The word Shavuot means “weeks.” It marks the completion of the seven-week counting period between Passover and Shavuot.
You shall count for yourselves — from the day after the Shabbat, from the day when you bring the Omer of the waving — seven Shabbats, they shall be complete. Until the day after the seventh sabbath you shall count, fifty days… You shall convoke on this very day — there shall be a holy convocation for yourselves — you shall do no laborious work; it is an eternal decree in your dwelling places for your generations. -Leviticus 21:15-16, 21