﴿ وَٱذْكُر رَّبَّكَ فِى نَفْسِكَ تَضَرُّعًۭا وَخِيفَةًۭ وَدُونَ ٱلْجَهْرِ مِنَ ٱلْقَوْلِ بِٱلْغُدُوِّ وَٱلْءَاصَالِ وَلَا تَكُن مِّنَ ٱلْغَٰفِلِينَ ﴾

“And bethink thyself of thy Sustainer humbly and with awe, and without raising thy voice, at morn and at evening; and do not allow thyself to be heedless.”

(And do thou (O Muhammad) remember thy Lord within thyself) recite alone by yourself, O Muhammad, if you are leading the prayer (humbly and with awe, below your breath) avoiding to raise your voice too loudly or lowering it too much, (at morn and evening) during the morning prayer and in evening prayer: Maghrib and 'Isha'. (And be you not of the neglectful) of reciting the Qur'an in prayers whether you are praying alone or leading the prayer.