US President Donald Trump is expected to underline the need to confront extremism in Islam when he makes a speech in Saudi Arabia later on Sunday.
His address, to a summit of regional leaders, will come on the second day of his first presidential trip abroad.
It is expected he will attempt to strike a collaborative tone in attempts to bolster support for the US fight against Islamic State (IS) militants.
On Saturday, the US signed trade deals of $350bn (£270bn) with Saudi Arabia.
This included the largest arms deal ever made in US history, which Secretary of State Rex Tillerson said was aimed at countering the “malign” influence of Iran, Saudi Arabia’s regional rival.
But the president’s visit has been overshadowed by his political difficulties at home, namely the fallout over his sacking of FBI chief James Comey.
Mr Trump caused controversy during his campaign by calling for Muslims to be temporarily banned from entering the US over security concerns. Legislation aimed at restricting travel from several Muslim-majority countries remains tied up in the US courts.