19:64
وَمَا نَتَنَزَّلُ إِلَّا بِأَمْرِ رَبِّكَ ۖ لَهُۥ مَا بَيْنَ أَيْدِينَا وَمَا خَلْفَنَا وَمَا بَيْنَ ذَٰلِكَ ۚ وَمَا كَانَ رَبُّكَ نَسِيًّا
[Gabriel said], "And we [angels] descend not except by the order of your Lord. To Him belongs that before us and that behind us and what is in between. And never is your Lord forgetful -
Context in Surah Maryam
Nearby ayahs help place verse 19:64 in sequence and meaning.
لَّا يَسْمَعُونَ فِيهَا لَغْوًا إِلَّا سَلَـٰمًا ۖ وَلَهُمْ رِزْقُهُمْ فِيهَا بُكْرَةً وَعَشِيًّا
They will not hear therein any ill speech - only [greetings of] peace - and they will have their provision therein, morning and afternoon.
تِلْكَ ٱلْجَنَّةُ ٱلَّتِى نُورِثُ مِنْ عِبَادِنَا مَن كَانَ تَقِيًّا
That is Paradise, which We give as inheritance to those of Our servants who were fearing of Allah.
رَّبُّ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ وَمَا بَيْنَهُمَا فَٱعْبُدْهُ وَٱصْطَبِرْ لِعِبَـٰدَتِهِۦ ۚ هَلْ تَعْلَمُ لَهُۥ سَمِيًّا
Lord of the heavens and the earth and whatever is between them - so worship Him and have patience for His worship. Do you know of any similarity to Him?"
وَيَقُولُ ٱلْإِنسَـٰنُ أَءِذَا مَا مِتُّ لَسَوْفَ أُخْرَجُ حَيًّا
And the disbeliever says, "When I have died, am I going to be brought forth alive?"