Asking as someone that would not discuss Arabic: Googling هذه ليلة وألف ليلة offers me the reserve "1001 nights" as a result. Is there a chance that what he sings is "This really is 1001 nights"? Fagen talks about how the Steely Dan songwriting method has adjusted over time, https://bookmarkahref.com/story18344194/the-greatest-guide-to-la-vie-en-rose-translation