pancha-mahayajna: five types of daily sacrifices preformed by brahmans as mentioned in the scripture Manu-samhita: (i) Brahma-yajna: study of the Vedas; (ii) Ptr-yajna: offering obsequial oblations to one’s ancestors; (iii) Deva-yajna: offering clarified butter to the gods through the Vedic fire sacrifice; (iv) Bhuta-yajna: offering food to other beings, and (v) Nr-yajna: honouring guests.

— books Srimad Bhagavad-gita / Glossary