Saudi King and Hitler's dagger

"The original report about Abdullah’s dagger comes from a 2004 book by Lebanese-American political science professor As’Ad AbhKhalil, “The Battle for Saudi Arabia.” Writing on the brief flirt between Nazi Germany and Saudi Arabia’s first monarch Ibn Saud, AbhKhalil cites a “private American source” who has visited the Saudi royal palace several times. He says that Abdullah “keeps in his displayed possessions a dagger given to him by Hitler.” "  The dagger was given to his father, and my source is a former US ambassador in Saudi Arabia, who often sat with the King in his private office, where the King (crown prince at the time, freely smoked--against Wahabiyyah morality).