Bhagavad Gita 4.15 Chapter 4, Verse 15

एवं ज्ञात्वा कृतं कर्म पूर्वैरपि मुमुक्षुभिः ।
कुरु कर्मैव तस्मात्त्वं पूर्वैः पूर्वतरं कृतम् ॥४.१५॥

evaṃ jñātvā kṛtaṃ karma pūrvairapi mumukṣubhiḥ
kuru karmaiva tasmāttvaṃ pūrvaiḥ pūrvataraṃ kṛtam

Meaning

Knowing this, the seekers of liberation of old also performed action. So you too should do your work, as the ancients did before you.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 4.15 (Chapter 4, The Yoga of Knowledge and Renunciation of Action, Verse 15)