Dr. Mustafa Khattab, the Clear Quran - Surah Az-Zumar, ayah 13

Translation of Surah Az-Zumar, ayah 13 (39:13)

قُلۡ إِنِّيٓ أَخَافُ إِنۡ عَصَيۡتُ رَبِّي عَذَابَ يَوۡمٍ عَظِيمٖ ١٣
Say, “I truly fear—if I were to disobey my Lord—the torment of a tremendous Day.”