Mordechai wrote that the bodies of two terrorists taken into Israeli custody on Friday were added to the 24 bodies being held by Israel.
He also issued a statement blaming Hamas for the pain experienced by the residents of Gaza.
"The Hamas terror organization that controls Gaza does not care about either the living or the dead. It is preventing the Muslim burial of the bodies," he wrote. "Israel will not rest and Gaza will know no peace until Israelis return from the strip and our soldiers are brought to burial in Israel."
Israel has said that 10 of the Palestinians killed over the weekend were people with terrorist records who were shot while carrying out terrorist activities.
Earlier on Sunday, the family of IDF officer Lieutenant Hadar Goldin petitioned the government and the security establishment, demanding that they not return the bodies.
"Israel must use the bodies as a bargaining chip against Hamas and hold them until a solution is found and the soldiers are returned," said Prof. Simcha Goldin, the father of Hadar, who died in Operation Protective Edge and whose remains are being held by Hamas."Since the cabinet decisions have not been fully implemented, we feel it necessary to make clear our position on this issue."
Six weeks ago the Goldin family filed an urgent petition to the High Court of Justice to issue a temporary injunction over the government's decision to release the bodies of terrorists who carried out attacks against Israeli citizens, policemen and IDF soldiers.
The family based their petition on a January 2017 Security Cabinet decision stating that Israel would hold on to the bodies of terrorists who "carried out exceptional terrorist attacks," as well as "the bodies of terrorists belonging to Hamas."
According to the Goldin family, the government has deviated from its decisions several times since then and it fears it will do it again now.