 एवं ब्रुवति काकुत्स्थे विश्वामित्रो महामुनि:।संहारं व्याजहाराथ धृतिमान् सुव्रतश्शुचि:।। 
 To these words spoken by Rama, maharshi Viswamitra who was patient practitioner of vows and pure taught the withdrawl mantra. 