एवं ज्ञात्वा कृतं कर्म पूर्वैरपि मुमुक्षुभिः। कुरु कर्मैव तस्मात्त्वं पूर्वैः पूर्वतरं कृतम्।।4.15।।
evaṁ jñātvā kṛitaṁ karma pūrvair api mumukṣhubhiḥ kuru karmaiva tasmāttvaṁ pūrvaiḥ pūrvataraṁ kṛitam
Having known this, the ancient seekers of freedom also performed action; therefore, do thou also perform action, as the ancients did in days of yore.