Bhagavad Gita 9.12
मोघाशा मोघकर्माणो मोघज्ञाना विचेतसः। राक्षसीमासुरीं चैव प्रकृतिं मोहिनीं श्रिताः।।9.12।।
moghāśā moghakarmāṇo moghajñānā vicetasaḥ| rākṣasīmāsurīṃ caiva prakṛtiṃ mohinīṃ śritāḥ||9.12||
moghasha moghakarmano moghajnana vicetasah rakshasimasurim caiva prakritim mohinim shritah9.12
Meaning
Those who are deluded take shelter in the nature of demons and those of divided knowledge. Their hopes, actions, and knowledge are all in vain because they follow the wrong path.
वृथा आशा, वृथा कर्म और वृथा ज्ञान वाले अविचारीजन राक्षसों के और असुरों के मोहित करने वाले स्वभाव को धारण किये रहते हैं।
This is verse 12 of 34 in Chapter 9 (Raja Vidya Raja Guhya Yoga) of the Bhagavad Gita.