He snuck into the home of Ibn Rashid's governor, 'Ajlan. It wasn't he who slew him, though; that distinction, rather, would go to a cousin of Ibn Saud: Abdallah bin Jiluwi, grandson of the founder of the Second Saudi State, Turki bin Abdallah, and whose descendants bear the surname 'al-Jiluwi'.

Source: Ibn Saud: The Desert Warrior and His Legacy, by Michael Darlow and Barbara Bray