Bhagwad Gita
Chapter 4, Verse 15
एवं ज्ञात्वा कृतं कर्म पूर्वैरपि मुमुक्षुभिः।
कुरु कर्मैव तस्मात्त्वं पूर्वैः पूर्वतरं कृतम्।।4.15।।
All the liberated souls in ancient times acted with this understanding and so attained liberation. Therefore, as the ancients, you should perform your duty in this divine consciousness.