The Holy Quran 23:18 — Surah Al-Mu'minun
Arabic text
وَأَنزَلْنَا مِنَ ٱلسَّمَآءِ مَآءًۢ بِقَدَرٍ فَأَسْكَنَّـٰهُ فِى ٱلْأَرْضِ ۖ وَإِنَّا عَلَىٰ ذَهَابٍۭ بِهِۦ لَقَـٰدِرُونَ
Translation
(According to Our wisdom,) We send stipulated quantities of water from the skies, embedding it into the earth (irrigating the roots of plants and storing underground water), and We are also capable of withdrawing it (whenever We wish, after which no other being can retrieve it).
Tafsir (excerpt) — Tafsir Usmani
Reserves of water: neither so much that the world would be destroyed out of time and out of place, nor so little that it would not suffice for needs. that is, the earth absorbs the rainwater into itself, and we draw it out by digging wells and the like.
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