Bhagwad Gita
Chapter 4, Verse 42
तस्मादज्ञानसंभूतं हृत्स्थं ज्ञानासिनाऽऽत्मनः।
छित्त्वैनं संशयं योगमातिष्ठोत्तिष्ठ भारत।।4.42।।
Therefore the doubts which have arisen in your heart out of ignorance should be slashed by the weapon of knowledge. Armed with yoga, O Bharata, stand and fight.