At an Alabama rally during his campaign, Trump said,

Saudi Arabia, I get along with all of them. They buy apartments from me. They spend $40 million, $50 million. Am I supposed to dislike them? I like them very much.

Trump created 8 businesses during his campaign that were linked to hotel interests in Saudi Arabia, 4 of which were registered the day of the rally in which he made his comments about Saudi Arabia.

Trump’s financial ties to Saudi Arabia go back further, still. In 1991, as he was scrambling to raise money to avoid bankruptcy, he sold his 282-foot Trump yacht “Princess” to Saudi billionaire Prince Alwaleed bin-Talal for $20 million, reportedly a third what he had originally paid. Four years later, bin-Talal joined other investors in a $325 million deal for Trump’s Plaza Hotel. In 2001, Saudi officials purchased the entire 45th floor of the Trump world Tower, which stands across from the United Nations building in New York, for $12 million.

Trump has since denied any conflicts of interest in his dealings with Saudi Arabia, particularly in the wake of journalist Jamal Khashoggi’s assassination and ongoing involvement in Yemen’s civil war, contributing to a growing humanitarian disaster.

CNN – Trump in 2015: Saudis buy apartments from me
The Washington Post – A scramble to assess the dangers of President elect Donald Trump’s global business empire
The Hill – Trump registered eight companies in Saudi Arabia during campaign: report
AP News – Trump’s business ties to kingdom run long and deep