The meeting took place in the oil-rich eastern Saudi city of Dhahran, a location that may have been selected by the kingdom to avoid cross-border Houthi missile strikes that have targeted the capital, Riyadh, and southern border cities.
"We extend our support to the Palestinians' right to establish their homeland based on the 1967 lines with the capital city Jerusalem, as stated in the worldwide resolutions and Arab peace initiative", said Al-Jubeir during his speech at foreign ministers' preparatory meeting on Friday.
"East Jerusalem is an integral part of the Palestinian territories", he stressed.
"Regional interference in Arab affairs has reached an unprecedented degree".
Saudi Arabia's King Salman on Sunday slammed Iran's "blatant interference" in regional affairs and criticized the US over Jerusalem as Arab leaders met in the kingdom for an annual gathering.
The final statement of the Arab League Summit did not accuse the Syrian authorities of reported use of chemical weapons in Duma, as was declared earlier by Saudi Foreign Minister Adel Jubeir.
Arab leaders have also agreed, according to the statement, to again call on some neighboring countries to exercise the "good neighboring policy" and respect the sovereignty of the Arab countries.
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The summit was held some two days after United States, France and Britain, hit three sites, one in Damascus, and two in the city of Homs, in Syria which US President Donald Trump claimed were "associated with the chemical weapon capabilities" of the Syrian government.
Gheit condemned Iranian interference in Bahrain and other Arab countries.
"The Palestinian cause has been and will always be our main cause until the Palestinians regain their rights", he said.
Saudi Arabia pushed for a tough, unified stance against Iran at the annual gathering of the 22-member Arab League.
On Saturday, the umbrella Arab League said the summit will not discuss Gulf crisis, which was triggered by last year's cut-off of diplomatic ties between four Arab states and Qatar amid accusations for Doha of supporting terrorism.
In attendance were leaders from the Middle East and North Africa, including Egyptian President Abdel Fattah al-Sisi and Jordanian King Abdullah.
Iran has always been a supporter of Syrian President Bashar Al-Assad and backs Lebanon's Shia Hizbollah movement, whose fighters are deployed in Syria alongside regime forces.