The Exile
لَوْ أَنزَلْنَا هَـٰذَا ٱلْقُرْءَانَ عَلَىٰ جَبَلٍ لَّرَأَيْتَهُۥ خَـٰشِعًا مُّتَصَدِّعًا مِّنْ خَشْيَةِ ٱللَّهِ ۚ وَتِلْكَ ٱلْأَمْثَـٰلُ نَضْرِبُهَا لِلنَّاسِ لَعَلَّهُمْ يَتَفَكَّرُونَ
If We had sent down this Qur'an upon a mountain, you would have seen it humbled and coming apart from fear of Allah. And these examples We present to the people that perhaps they will give thought.
Nearby ayahs help place verse 59:21 in sequence and meaning.
وَلَا تَكُونُوا۟ كَٱلَّذِينَ نَسُوا۟ ٱللَّهَ فَأَنسَىٰهُمْ أَنفُسَهُمْ ۚ أُو۟لَـٰٓئِكَ هُمُ ٱلْفَـٰسِقُونَ
And be not like those who forgot Allah, so He made them forget themselves. Those are the defiantly disobedient.
لَا يَسْتَوِىٓ أَصْحَـٰبُ ٱلنَّارِ وَأَصْحَـٰبُ ٱلْجَنَّةِ ۚ أَصْحَـٰبُ ٱلْجَنَّةِ هُمُ ٱلْفَآئِزُونَ
Not equal are the companions of the Fire and the companions of Paradise. The companions of Paradise - they are the attainers [of success].
هُوَ ٱللَّهُ ٱلَّذِى لَآ إِلَـٰهَ إِلَّا هُوَ ۖ عَـٰلِمُ ٱلْغَيْبِ وَٱلشَّهَـٰدَةِ ۖ هُوَ ٱلرَّحْمَـٰنُ ٱلرَّحِيمُ
He is Allah, other than whom there is no deity, Knower of the unseen and the witnessed. He is the Entirely Merciful, the Especially Merciful.
هُوَ ٱللَّهُ ٱلَّذِى لَآ إِلَـٰهَ إِلَّا هُوَ ٱلْمَلِكُ ٱلْقُدُّوسُ ٱلسَّلَـٰمُ ٱلْمُؤْمِنُ ٱلْمُهَيْمِنُ ٱلْعَزِيزُ ٱلْجَبَّارُ ٱلْمُتَكَبِّرُ ۚ سُبْحَـٰنَ ٱللَّهِ عَمَّا يُشْرِكُونَ
He is Allah, other than whom there is no deity, the Sovereign, the Pure, the Perfection, the Bestower of Faith, the Overseer, the Exalted in Might, the Compeller, the Superior. Exalted is Allah above whatever they associate with Him.