Final answer:
Eliyahu haNavi, or Elijah the Prophet, is invited to join during the Passover Seder, symbolizing faith in future redemption.
Step-by-step explanation:
We invite Eliyahu haNavi, known as Elijah the Prophet, to join us during the Jewish holiday of Passover, specifically at the Seder dinner. This tradition involves opening the door to symbolically welcome Eliyahu haNavi into our homes, signifying our faith and hope for redemption. It is believed that he will arrive as a harbinger of the coming of the Messiah, and his presence is invoked at the Seder to indicate the openness to miraculous changes and the hope for a better future.