Melonworm Moth

In another palace he found Kṛṣṇa performing the pañca-yajña sacrifice, which is compulsory for a householder. This yajña is also known as pañca-sūnā. Knowingly or unknowingly, everyone, especially the householder, commits five kinds of sinful activities. When we receive water from a water pitcher, we kill many germs that are in it. Similarly, when we use a grinding machine or eat food, we kill many germs. When sweeping a floor or igniting a fire we kill many germs, and when we walk on the street we kill many ants and other insects. Consciously or unconsciously, in all our different activities, we are killing. Therefore, it is incumbent upon every householder to perform the pañca-sūnā sacrifice to rid himself of the reactions to such sinful activities.
(Krsna book – Chapter 69)