But even as he addressed the Muslim world on Sunday, his administration is continuing to defend the executive order Trump signed to bar visitors from six Muslim-majority countries, which was blocked in U.S. federal court amid criticism that the order is Trump's attempt to fulfill his campaign promise to ban Muslims from the US.
Instead, he used the term "Islamist extremism", which refers to Islamism as political movement rather than Islam as a religion, a distinction that he had frequently criticized the administration of his predecessor Barack Obama for making.
"This is not a battle between different faiths, different sects or different civilizations", Trump said.
"And we believe it's the beginning of a turning point in the relationship between the United States and the Arab and Islamic world".
President Donald Trump receives an extravagant welcome Saturday, greeted by Saudi King Salman (right) and a playing of the USA national anthem.
Trump's signature phrase "radical Islamic terrorism" was not included in the speech, according to excerpts released in advance by the White House. "Muslim majority countries must take the lead in stamping out radicalization".
"But nations of the Middle East can not wait for American power to crush this enemy for them", Trump told leaders of 55 Muslim majority countries representing more than a billion people.
Trump's son-in-law and senior adviser Jared Kushner called the president of Lockheed Martin, a major supplier of US military equipment, for a lower price for the radar system as part of the deal, according to The New York Times. "And for us that means jobs, and it also means frankly great security back here, which we want".
A meeting with Egyptian President Abdel-Fattah el-Sissi underscored the kinship, with Mr Trump saluting his counterpart on the April release of Egyptian-American charity worker Aya Hijazi, who had been detained in the country for almost three years.More news: Preakness Stakes victor , payouts: Superfecta brings in huge money
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Trump's presidential campaign was frequently punctuated by bouts of anti-Islamic rhetoric. As the participants laughed, Mr Trump responded: "I agree". "Love your shoes. Boy, those shoes", he said.
The elaborate welcome extended all the way to the Royal Palace, where Mr Trump was awarded Saudi Arabia's highest civilian honour. "We will have truly drowned the voices of extremism and we will have drained the swamps from which extremism and terrorism emanates".
He'll also attend the opening of the new Global Center for Combating Extremist Ideology.
The U.S and Saudi Arabia have agreed on an arms deal worth nearly $110 billion Dollars "to support Saudi Arabia's defense needs", the State Department said in a statement Saturday.
The White House said the President's meetings underscored the deep and longstanding commitment of the U.S.to the security, stability and prosperity of Saudi Arabia and demonstrated the President's confidence in the future of U.S. -Saudi relations.
A center to fight terror financing is set to be established under a joint agreement between USA and Gulf leaders.
Leaders of the Gulf Cooperation Council (GCC) countries kicked off summit talks in Saudi capital Riyadh on Sunday.
She says it includes a pledge to prosecute the financing of terrorism, including individuals.