Surah Al-Hijr — Ayah 21 (15:21)
وَإِن مِّن شَيۡءٍ إِلَّا عِندَنَا خَزَآئِنُهُۥ وَمَا نُنَزِّلُهُۥٓ إِلَّا بِقَدَرٖ مَّعۡلُومٖ ٢١
English translation (Saheeh International)
And there is not a thing but that with Us are its depositories, and We do not send it down except according to a known [i.e., specified] measure.
Brief commentary
For all that benefits people and animals I am able to produce it and benefit people with it. I do not provide such things except according to a specific quantity determined by My wisdom and will.