﴿ وَأَنزَلْنَا مِنَ ٱلسَّمَآءِ مَآءًۢ بِقَدَرٍۢ فَأَسْكَنَّٰهُ فِى ٱلْأَرْضِ ۖ وَإِنَّا عَلَىٰ ذَهَابٍۭ بِهِۦ لَقَٰدِرُونَ ﴾

“And We send down water from the skies in accordance with a measure [set by Us], and then We cause it to lodge in the earth: but, behold, We are most certainly able to withdraw this [blessing]!”

(And We send down from the sky water) rain (in measure) of livelihood; and it is also said that this means: in proportion of what you need, (and We give it lodging) and We deposit it (in the earth) thus making from it pools, fountains, rivers and brooks, (and lo! We are able to withdraw it) and We are Able to leave it unused in the depth of the earth.