Sacrifice, gift, mercy, the Vedas, and truth, O king,-these five,-are purifying. The sixth is penance well-practised. This last, O Janamejaya, is highly purifying for kings.
यज्ञो दानं दया वेदाः सत्यं च पृथिवीपते। पञ्चैतानि पवित्राणि षष्ठं सुचरितं तपः॥ तदेव राज्ञां परमं पवित्रं जनमेजया