Interestingly enough:

"Waswas (in Arabic وسوس) in Islam is a term for "whispers from Shaytan". When a Muslim has some thoughts against Islam, he disregards them as waswas – a voice of Shaytan. "

From https://wikiislam.net/wiki/Waswas

Holy shit, I didn't understand the joke until I realized that "was" is the past tense version of "is."