Bhagavad Gita 14.1

भगवान श्रीउवाच |
परं भूयः प्रवक्ष्यामि ज्ञानानां ज्ञानमुत्तमम् |
यज्ज्यत्व मनुष्य: सर्वे परां सिद्धिमितो गता:

Translation

The Divine Lord said: I shall once again explain to you the supreme wisdom, the best of all knowledge; by knowing which, all the great saints attained the highest perfection.