The ceremony was attended by Knesset members and representatives from Israeli security forces.
Exhibits in honor of the hostages have been set up in Israel and abroad over the last few weeks. The exhibits range from shoes to beds, to tables with empty seats.
The session, which was set to be another dramatic few months of legislation, will be muted until the end of the war with legislation only of laws related to the war.
Knesset speaker Amir Ohana has suggested swapping the High Court with a "constitutional court."
If the court has been conducting review of regular legislation on the basis that basic laws have a special status, then removing the status that underpins the system would leave it without merit.
Amir Ohana warned that a ruling to strike down a basic law would be "against the Knesset and Israeli democracy."
Mayara is the first Moroccan official to make an official visit to the Knesset, and he will be welcomed in a ceremony that will feature the Moroccan flag and anthem.
Knesset Speaker, highest-ranking Israeli official to visit Rabat, says King Mohamed VI has role in bringing peace between Israel and Palestinians
Amir Ohana's visit to Morocco is a meaningful and significant one in the strengthening of ties between Israel and a key Muslim state in the region.
Ohana is expected to meet with the president of the Moroccan parliament, Rashid Talbi Al-Alami.