Surah Ibrahim 14:43
مُهْطِعِينَ مُقْنِعِى رُءُوسِهِمْ لَا يَرْتَدُّ إِلَيْهِمْ طَرْفُهُمْ ۖ وَأَفْـِٔدَتُهُمْ هَوَآءٌ ٤٣
EnglishSahih International
Racing ahead, their heads raised up, their glance does not come back to them, and their hearts are void.