Saudi Arabia’s crown prince said Thursday the kingdom wants to invest $600 billion in the United States over the next four years, comments that came after President Donald Trump earlier put a price tag on returning to the kingdom as his first foreign trip.

The Saudi media reported that Crown Prince Mohammed bin Salman had spoken with President Trump, who made the kingdom the first stop on his first overseas presidential trip in 2017.

Saudi Arabia​'s crown prince told President Trump in a call that the kingdom intends to invest $600 billion in the U.S. over the next four years.