Surah Al-Mu'minun — Ayah 18 (23:18)
وَأَنزَلۡنَا مِنَ ٱلسَّمَآءِ مَآءَۢ بِقَدَرٖ فَأَسۡكَنَّٰهُ فِي ٱلۡأَرۡضِۖ وَإِنَّا عَلَىٰ ذَهَابِۭ بِهِۦ لَقَٰدِرُونَ ١٨
English translation (Saheeh International)
And We have sent down rain from the sky in a measured amount and settled it in the earth. And indeed, We are Able to take it away.
Brief commentary
I sent down rain from the heavens according to the need toward it; not in excessive amounts that cause ruin, nor too little that is insufficient. I allow it to settle on earth so that the people and animals can take benefit from it. Otherwise, I am capable of causing it to wash away, in which case they would not be able to benefit from it.