Bhagavatapurana 4.18.27

4.18.27

evaṃ pṛthv-ādayaḥ pṛthvīm annādāḥ svannam ātmanaḥ /
doha-vatsādi-bhedena kṣīra-bhedaṃ kurūdvaha //

27. O Vidura, in this manner Prithu and others who subsist on food, derived from the earth the milk which forms their desired food and which differs in kind according to the difference in the calf and the vessel.