Preservation of the Quran

وَٱتْلُ مَآ أُوحِىَ إِلَيْكَ مِن كِتَابِ رَبِّكَ ۖ لَا مُبَدِّلَ لِكَلِمَـٰتِهِۦ وَلَن تَجِدَ مِن دُونِهِۦ مُلْتَحَدًا

And recite, [O Muḥammad], what has been revealed to you of the Book of your Lord. There is no changer of His words, and never will you find in other than Him a refuge.

عَلَىٰ قَلْبِكَ لِتَكُونَ مِنَ ٱلْمُنذِرِينَ

Upon your heart, [O Muḥammad] - that you may be of the warners -

وَإِنَّهُۥ فِىٓ أُمِّ ٱلْكِتَـٰبِ لَدَيْنَا لَعَلِىٌّ حَكِيمٌ

And indeed it is, in the Mother of the Book with Us, exalted and full of wisdom.

لَا تُحَرِّكْ بِهِۦ لِسَانَكَ لِتَعْجَلَ بِهِۦٓ

Move not your tongue with it, [O Muḥammad], to hasten with it [i.e., recitation of the Qur’ān].