Bhagavad Gita 4.37

यथैधांसि समिद्धोऽग्निर्भस्मसात्कुरुतेऽर्जुन।ज्ञानाग्निः सर्वकर्माणि भस्मसात्कुरुते तथा ॥४.३७॥

yathaidhāṃsi samiddho’gnirbhasmasātkurute’rjunajñānāgniḥ sarvakarmāṇi bhasmasātkurute tathā

As the blazing fire reduces fuel to ashes, O Arjuna, so does the fire of knowledge reduce all actions to ash.

गीता