Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Jnana-Karma-Sanyasa Yoga Chapter 4, Verse 4.40.
Sanskrit
अज्ञश्चाश्रद्दधानश्च संशयात्मा विनश्यति । नायं लोकोऽस्ति न परो न सुखं संशयात्मनः ॥ ४.४० ॥
Hindi
विवेकहीन और श्रद्धारहित संशययुक्त मनुष्य परमार्थसे अवश्य भ्रष्ट हो जाता है। ऐसे संशययुक्त मनुष्यके लिये न यह लोक है, न परलोक है और न सुख ही है|
English
If a person is ignorant of the Knowledge of God, the person who lacks faith in God and the one who is full of doubts in his own self, will undoubtedly be destroyed. If one has doubts, he can never achieve peace and Bliss in the world, nor in the after-world.