Bhagavatapurana 12.7.13

12.7.13

vṛttir bhūtāni bhūtānāṃ carāṇām acarāṇi ca /
kṛtā svena nṛṇāṃ tatra kāmāc codanayāpi vā //

13. Generally the immobile creatures contribute to the sustenance of the mobile, and there, in the case of mankind, the description of sustenance may be three-fold, according to nature, desire, or a rule laid down for it.