Qur'an 15:21 · Al-Hijr

وَإِن مِّن شَىْءٍ إِلَّا عِندَنَا خَزَآئِنُهُۥ وَمَا نُنَزِّلُهُۥٓ إِلَّا بِقَدَرٍۢ مَّعْلُومٍۢ

(21) 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.