Racing ahead, their heads raised up, their glance does not come back to them, and their hearts are void.
The Saheeh International Quran Translation
مُهْطِعِينَ مُقْنِعِى رُءُوسِهِمْ لَا يَرْتَدُّ إِلَيْهِمْ طَرْفُهُمْ وَأَفْـِٔدَتُهُمْ هَوَآءٌRacing ahead, their heads raised up, their glance does not come back to them, and their hearts are void.