وَإِذا نادَيتُم إِلَى الصَّلاةِ اتَّخَذوها هُزُوًا وَلَعِبًا ۚ ذٰلِكَ بِأَنَّهُم قَومٌ لا يَعقِلونَ

When you call for prayer, they treat it as a jest and a diversion. This is because they are people who lack understanding.