Bhagavad Gita 16.7
The godless do not know how to act or renounce; they lack both purity and truth. They do not understand the right principles of conduct.
प्रवृत्तिं च निवृत्तिं च जना न विदुरासुराः।न शौचं नापि चाचारो न सत्यं तेषु विद्यते॥pravṛttiṃ ca nivṛttiṃ ca janā na vidurāsurāḥ|na śaucaṃ nāpi cācāro na satyaṃ teṣu vidyate||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).