Palestinian President Mahmoud Abbas told the United Nations General Assembly on Thursday that Middle East peace was not achievable until the Palestinians are granted full rights.
He spoke as the US appeared to make progress in brokering a normalisation deal between Israel and Saudi Arabia.
"Whoever thinks peace in the Middle East is possible before our people achieved their full right is delusional," Abbas said.
Israeli-Saudi normalisation would dramatically redraw the Middle East by formally bringing together two major US partners and longtime adversaries.
The normalisation talks are the centerpiece of complex negotiations that also include discussions of US security guarantees and civilian nuclear help that Riyadh has sought, as well as possible Israeli concessions to the Palestinians.
Saudi and US calls for the Palestinians to make gains under any deal are likely unpalatable for Israeli Prime Minister Benjamin Netanyahu's hard-right government. Netanyahu met US President Joe Biden on Wednesday on the sidelines of the annual general assembly in New York.
Abbas also called on the United Nations to convene a conference to try to revive Israeli-Palestinian peace talks, which collapsed in 2014.