Leviticus 23:40 "And you shall take for yourselves on the first day (of Sukkot)"

On the first day of Sukkot, we are commanded to take four kinds of plants and to use them in our service, rejoicing before HaShem on the holiday.

These plants are:

  1. The Lulav - an unopened palm branch.
  2. The Etrog - the fruit of the citron tree.
  3. Hadasim - at least three myrtle branches.
  4. Aravot - two willows that grow near a brook.

We attach the Hadasim and Aravot to the Lulav and while holding the Etrog next to the Lulav, we recite the proper blessing.