Jordan's King Abdullah said in his opening speech at the Cairo Peace Summit on Saturday that the forced or internal displacement of Palestinians would be a war crime.
The summit is being held as Israel prepares a ground assault on Gaza following Hamas' attack that killed 1,400 people.
More than 4,100 Palestinians have been killed in Israel's counteroffensive, according to Gaza's Health Ministry, amid a growing humanitarian crisis.
Saudi Arabia's foreign minister said on Saturday that he rejected "attempts at forced displacement" of the people of Gaza by Israel.
The summit is being held in Egypt as Israel prepares a ground assault on Gaza following Hamas' attack that killed 1,400 people. More than 4,100 Palestinians have been killed in Israel's counteroffensive, according to Gaza's Health Ministry, amid a growing humanitarian crisis.