Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 8

Sanskrit:

श्रीनन्द उवाचपर्जन्यो भगवानिन्द्रो मेघास्तस्यात्ममूर्तय: । तेऽभिवर्षन्ति भूतानां प्रीणनं जीवनं पय: ॥ ८ ॥

ITRANS:

śrī-nanda uvācaparjanyo bhagavān indromeghās tasyātma-mūrtayaḥte ’bhivarṣanti bhūtānāṁprīṇanaṁ jīvanaṁ payaḥ

Translation:

Nanda Mahārāja replied: The great Lord Indra is the controller of the rain. The clouds are his personal representatives, and they directly provide rainwater, which gives happiness and sustenance to all creatures.

Purport:

Without clean rainwater, the earth could not possibly provide food or drink for anyone, nor could there be cleanliness. Thus it would be difficult to overestimate the value of rain.