Az-Zumar - 13

﴿قُلْ إِنِّي أَخَافُ إِنْ عَصَيْتُ رَبِّي عَذَابَ يَوْمٍ عَظِيمٍ﴾

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13. Say (O Muhammad ﷺ): "Verily if I disobey my Lord, I am afraid of the torment of a great Day."