When five hundreds years had thus passed away of his vow, the Danavas came to know his intention. One day the Danavas saw Kacha when he was tending (his preceptor's) kine. They then killed him out of the hatred they bore against Brihaspati and from the desire of saving the knowledge of Sanjivini.
पञ्चवर्षशतान्येवं कचस्य चरतो व्रतम्। तत्रातीयुरथो बुद्ध्वा दानवास्तं ततः कचम्॥ गा रक्षन्तं वने दृष्ट्वा रहस्येकममर्षिताः। जघ्नुर्वृहस्पतेद्वेषाद् विद्यारक्षार्थमेव च॥