17:85
وَيَسْـَٔلُونَكَ عَنِ ٱلرُّوحِ ۖ قُلِ ٱلرُّوحُ مِنْ أَمْرِ رَبِّى وَمَآ أُوتِيتُم مِّنَ ٱلْعِلْمِ إِلَّا قَلِيلًا
And they ask you, [O Muhammad], about the soul. Say, "The soul is of the affair of my Lord. And mankind have not been given of knowledge except a little."
Context in Surah Al-Isra
Nearby ayahs help place verse 17:85 in sequence and meaning.
وَإِذَآ أَنْعَمْنَا عَلَى ٱلْإِنسَـٰنِ أَعْرَضَ وَنَـَٔا بِجَانِبِهِۦ ۖ وَإِذَا مَسَّهُ ٱلشَّرُّ كَانَ يَـُٔوسًا
And when We bestow favor upon the disbeliever, he turns away and distances himself; and when evil touches him, he is ever despairing.
قُلْ كُلٌّ يَعْمَلُ عَلَىٰ شَاكِلَتِهِۦ فَرَبُّكُمْ أَعْلَمُ بِمَنْ هُوَ أَهْدَىٰ سَبِيلًا
Say, "Each works according to his manner, but your Lord is most knowing of who is best guided in way."
وَلَئِن شِئْنَا لَنَذْهَبَنَّ بِٱلَّذِىٓ أَوْحَيْنَآ إِلَيْكَ ثُمَّ لَا تَجِدُ لَكَ بِهِۦ عَلَيْنَا وَكِيلًا
And if We willed, We could surely do away with that which We revealed to you. Then you would not find for yourself concerning it an advocate against Us.
إِلَّا رَحْمَةً مِّن رَّبِّكَ ۚ إِنَّ فَضْلَهُۥ كَانَ عَلَيْكَ كَبِيرًا
Except [We have left it with you] as a mercy from your Lord. Indeed, His favor upon you has ever been great.