Surah Ash-Shu'ara, ayah 135

إِنِّيٓ أَخَافُ عَلَيۡكُمۡ عَذَابَ يَوۡمٍ عَظِيمٖ ١٣٥

Innī akhāfu 'alaykum 'adhāba yawmin 'azīm

Indeed, I fear for you the punishment of a terrible day."