الحجر — Al-Hijr Ayat 21
وَاِنْ مِّنْ شَيْءٍ اِلَّا عِنْدَنَا خَزَاۤىِٕنُهٗ وَمَا نُنَزِّلُهٗٓ اِلَّا بِقَدَرٍ مَّعْلُوْمٍ
Wa im min syai'in illā ‘indanā khazā'inuhū wa mā nunazziluhū illā biqadarim ma‘lūm(un).
"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 measure."