وَأَقِمِ الصَّلاَةَ طَرَفَيِ النَّهَارِ وَزُلَفًا مِّنَ اللَّيْلِ إِنَّ الْحَسَنَاتِ يُذْهِبْنَ السَّيِّئَاتِ ذَلِكَ ذِكْرَى لِلذَّاكِرِينَ
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سورة هود
(11/114) Keep up the prayer in the two parts of the day and when the night approaches the day. Surely good deeds take away evil deeds. This is an admonition for those who remember (repeat the Name of Allah saying Allah, Allah one after another).
Surah Hud