And there is not a thing but that with Us are its (15:21)

Almuntakhab Fi Tafsir Alquran Alkarim

No material or immaterial object, an article or a substance of any kind or anything with which anyone is concerned in action or in thought but We have infinite stores thereof, and what We release from all and each and send down to meet the needs is ascertained by due measure

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(15:21) There is not a thing whose treasures are not with Us, and We send down each thing in appropriate measure. *14

And there is not a thing but that with Us are its meaning

*14) This is to bring home the fact that it is not vegetable life alone that has a fixed limit to its growth, etc: The same is true of everything that exists, whether it be air, water, light, heat, cold, mineral, vegetable. animal or power or energy, in short, each and every thing exists in the prescribed quantity, number, etc. , which neither decreases nor increases. It is this "determined course", in each and every thing, which has produced appropriate balance and proportion in the entire system of the universe to such a perfection that one is led to the inevitable conclusion that the whole thing has been designed by its All-Wise Creator. For, had the universe come into existence by mere accident or had it been created by many gods, it was impossible to have such a perfect balance and appropriate proportion with perpetual consistence in so many different things and powers.
 

And there is not a thing but that with Us are its meaning in Urdu

کوئی چیز ایسی نہیں جس کے خزانے ہمارے پاس نہ ہوں، اور جس چیز کو بھی ہم نازل کرتے ہیں ایک مقرر مقدار میں نازل کرتے ہیں