In Chapter 4 of the Bhagwad Gita, Krishna explains how Karma Yogis free themselves of their karmic chains. He says, their every action is sacrificed to God; thus, there is no karmic reaction. There are many types of sacrifice: wealth, austerities, incoming and outgoing breath, knowledge and so on. In the Bhagavad Gita, Chapter 4, Verse 31, Krishna says: those who perform no sacrifice find no happiness either in this world or the next