﴿ وَإِذَا نَادَيْتُمْ إِلَى ٱلصَّلَوٰةِ ٱتَّخَذُوهَا هُزُوًۭا وَلَعِبًۭا ۚ ذَٰلِكَ بِأَنَّهُمْ قَوْمٌۭ لَّا يَعْقِلُونَ ﴾

“for, when you call to prayer, they mock at it and make a jest of it-simply because they are people who do not use their reason.”

(And when ye call to prayer) through the call to prayer (adhan) and the call announcing the start of the prayer (iqamah) (they take it for a jest and sport) they take it as a joke and falsehood. (That) jest (is because they are a folk who understand not) Allah's command nor do they know Allah's divine Oneness nor His religion. This verse was revealed about a Jewish man who used to poke fun at Bilal's call to prayer, and so Allah burned him.