Qur'an 17:85

وَيَسْـَٔلُونَكَ عَنِ ٱلرُّوحِ ۖ قُلِ ٱلرُّوحُ مِنْ أَمْرِ رَبِّى وَمَآ أُوتِيتُم مِّنَ ٱلْعِلْمِ إِلَّا قَلِيلًا

“And they ask you, [O Muḥammad], about the soul. Say, "The soul is of the affair [i.e., concern] of my Lord. And you [i.e., mankind] have not been given of knowledge except a little."”

Al-Israa 17:85 · Saheeh International