The 29th Arab summit got underway in Saudi Arabia on Sunday under the patronage of Custodian of the Two Holy Mosques King Salman bin Abdulaziz, who warned of Iran's looming threat against the region.
In the same way, he added, Iran expects regional countries not to make false allegations, show mutual respect, and not interfere in each other's affairs.
King Salman said Saudi Arabia was donating $200-million to support the Palestinians, including $50-million for the U.N. Relief and Works Agency (UNRWA).
Despite being a stalwart ally of the United States, the ruler also criticised US President Donald Trump's controversial decision to recognise Jerusalem as Israel's capital and shift the US embassy there.
The summit reviewed trade and investment matters, the Arab strategy to meet water challenges, the second phase of the Arab emergency food security programme and the Arab agreement for the exchange of information on plant and heritage resources.
Within the same context, Arab leaders will condemn the Turkish military operations in Syria's Afrin and the military operations in the Ghouta area by the regime with Russian and Iranian support. Saudi Arabia's king turned his attention with long-time foe Iran - only 160 kilometres (100 miles) across the Gulf from Dhahran.
Saudi Arabia's King Salman has criticised Donald Trump's decision to move the United States embassy in Israel from Tel Aviv to Jerusalem.
"The Palestinian cause is our primary cause and it will remain so until our fraternal Palestinian people obtain all of their legitimate rights, starting with the establishment of an independent state, whose capital is east Jerusalem", he stressed.More news: Tom Rogic nets as Celtic thrash Rangers in Scottish Cup semi-final
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"We reject its blatant meddling in the internal affairs of Arab countries", declared King Salman.
Qassemi also expressed deep regret over some parts of the final statement of the Arab League summit which was held in Dhahran, Saudi Arabia.
Regional powerhouses Saudi Arabia and Iran have been locked in a decades-long struggle for supremacy that is being waged in proxy wars in several countries, including Yemen and Syria.
Iran is backing Houthi rebels that Riyadh opposes in Yemen and on Sunday Salman praised "the UN Security Council's statement denouncing the Iranian-made ballistic missile fire on Saudi cities".
Qatar, which has confirmed it will attend the summit, also backed the strikes.
"We urge the worldwide community to sanction Iran and forbid it to back Houthi terrorists and provide them missiles", the statement said.
Summits of the Arab League, established in 1945, rarely result in action.