Practising austerities while living like a forest recluse, one should shave off and having purified himself by acts, pass into the fourth and the last holy mode of life.
केशलोमनखान् वाप्य वानप्रस्थो मुनिस्ततः। आश्रमादाश्रमं पुण्यं पूतो गच्छति कर्मभिः॥