The question of Jerusalem is also likely to figure prominently at the summit as the United States prepares to move its embassy there from Tel Aviv after declaring the disputed city the capital of Israel in a break with decades of global diplomacy.
On Sunday, Jubeir commented on the statement adopted at the summit, saying that the Arab League condemned the use of chemical weapons by Syrian authorities, however the released text of the document does not include the statement.
Opening the 29th Arab League summit, the king also criticised the United States decision to transfer its embassy in Israel to Jerusalem and described "terrorism" as the biggest challenge facing Arab countries.
Saudi Arabia's King Salman on Sunday announced a $150 million donation for the maintenance of Islamic heritage in East Jerusalem.
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).
The Arab League called on Sunday for an global probe into the "criminal" use of chemical weapons in Syria and condemned what it saw as Iran's interference in the affairs of other countries.
"East Jerusalem is an integral part of the Palestinian territories", he stressed.
Saudi Arabia's push for a tough stand against its arch-rival Iran will also dominate the summit as regional tensions grow over the wars in Syria and Yemen.
Jerusalem remains at the heart of the Middle East conflict, with Palestinians hoping that East Jerusalem - occupied by Israel since 1967 - might eventually serve as the capital of a Palestinian state.
At a preliminary meeting in Riyadh on Thursday, Arab ministers focused heavily on blocking the embassy move, unanimously condemning Trump's decision and moving to block Israel's bid to secure at seat at the UN Security Council this June.
Not at the summit is Qatar, which has been cut off from its Gulf allies over accusations of ties to Iran and support for extremists - claims denied by Doha.
Among the leaders in attendance was Sudan's Omar al-Bashir, who walked the red carpet and was greeted by King Salman.
Summits of the Arab League, established in 1945, rarely result in action.
Despite widespread Arab condemnation of the suspected chemical attack, the Dhahran summit is unlikely to call for Assad to step down.
Gulf Arab states have made massive donations to Syria but have not officially offered asylum to Syrians.