It is said:

"By performing oblations with ghee, the demigods are satisfied. By studying the Vedas, brahma-yajna is performed, and by this the great sages are satisfied. Offering libations of water before one's forefathers is called pitr-yajna. By offering tribute, bhuta-yajna is performed. By properly receiving guests, nr-yajna is performed." There are five yajnas and five kinds of indebtedness-indebtedness to the demigods, great sages, forefathers, living entities and common men. Therefore one has to perform five kinds of yajnas, but when one takes to sankirtana-yajna (the chanting of the Hare Krsna mantra) one doesn't have to perform any other yajna. In Srimad-Bhagavatam, Narada Muni made a statement about the systematic performance of bhagavata-dharma in connection with statements previously made by the nine Yogendras before Maharaja Nimi. The sage Karabhajana Rsi explained the four incarnations of the four yugas, and at the end, in this verse (text 141), he explained the position of Krsna's pure devotee and how he is absolved of all debts.