مُهطِعينَ مُقنِعي رُءوسِهِم لا يَرتَدُّ إِلَيهِم طَرفُهُم ۖ وَأَفئِدَتُهُم هَواءٌ

Racing ahead, their heads raised up, their glance does not come back to them, and their hearts are void.