During the first meeting with the new PA government, which sworn in on Saturday, he said: "The coming days will witness very hard developments".
Lawyer Nael Al-Hawah spotted the omission after Palestinian prime minister Mohammad Shtayyeh's new government was sworn in before president Mahmoud Abbas on Saturday.
The new government is led by Prime Minister Mohammed Ishtayeh, a veteran peace negotiator and critic of the Islamist movement Hamas, which governs in the Gaza Strip.
Representatives from both the Palestinian and Israeli governments say their leadership will at least look at the plan before making judgments, though the Palestinians maintain that President Donald Trump is biased against their interests.
Khloe Kardashian is anxious for True's birthday
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Abbas's decision comes after forming a new government, which has ended the role of the national unity government, of which Hamas took part in its formation. It includes many of his longtime allies and members of Fatah, though several smaller factions are also represented.
Hamas said in a statement that the new government "resorts to unilateralism and monopoly of power".
Since coming to power, Trump has proven to be perhaps the most pro-Israel American president in history, breaking with decades of worldwide consensus to recognise Jerusalem as the country's capital and Israel's control over the Golan Heights.
In a letter sent to the Guardian newspaper, former high-ranking European politicians call on Europe to reject the expected plan unless it is fair to the Palestinians.