Chapter 3: Sloka14

3.14

annād bhavanti bhūtāni
parjanyād anna-sambhavaḥ
yajñād bhavati parjanyo
yajñaḥ karma-samudbhavaḥ

annāt—from grains; bhavanti—grow; bhūtāni—the material bodies; parjanyāt—from rains; anna—food grains; sambhavaḥ—are made possible; yajñāt—from the performance of sacrifice; bhavati—becomes possible; parjanyaḥ—rains; yajñaḥ—performance of yajña; karma—prescribed duties; samudbhavaḥ—born of.

All living bodies subsist on food grains, which are produced from rain. Rains are produced by performance of yajña [sacrifice], and yajña is born of prescribed duties.