Chandogya Upanishad 7.10.1

7.10.1

āpo vāvānnād bhūyasyaḥ \
tasmād yadā suvṛṣṭir na bhavati vyādhīyante prāṇā annaṃ kanīyo bhaviṣyatīti \
atha yadā suvṛṣṭir bhavaty ānandinaḥ prāṇā bhavanty annaṃ bahu bhaviṣyatīti \
āpa evemā mūrtā yeyaṃ pṛthivī yad antarikṣaṃ yad dyaur yat parvatā yad devamanuṣyā yat paśavaś ca vayāṃsi ca tṛṇavanaspatayaḥ śvāpadāny ākīṭapataṅgapipīlakam \
āpa evemā mūrtāḥ \
apa upāssveti \\710.1\

'Water surely is greater than food.' Therefore, where there is not good rain, living creatures are in agony (thinking), "Food will be scarce". But when there is good rain, living creatures become joyous (thinking), "Food will abound". Water, indeed, has assumed all these forms—this earth, this sky, this heaven, these mountains, these gods and men, these cattle and birds, grasses and trees, beasts down to worms, flying insects and ants. Water, indeed, has assumed all these forms. Worship water.