Bhagavad Gita 4.37
As the kindled fire consumes the fuel, so, O Arjuna, the embers of action are burnt to ashes in the flame of wisdom.
यथैधांसि समिद्धोऽग्निर्भस्मसात्कुरुतेऽर्जुन।
ज्ञानाग्निः सर्वकर्माणि भस्मसात्कुरुते तथा॥yathaidhāṃsi samiddho'gnirbhasmasātkurute'rjuna|
jñānāgniḥ sarvakarmāṇi bhasmasātkurute tathā||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).