Bhagavad Gita 9.3

They who have no faith in this teaching cannot find Me; they remain lost in the purlieus of this perishable world.

अश्रद्दधानाः पुरुषा धर्मस्यास्य परन्तप।
अप्राप्य मां निवर्तन्ते मृत्युसंसारवर्त्मनि॥

aśraddadhānāḥ puruṣā dharmasyāsya parantapa|
aprāpya māṃ nivartante mṛtyusaṃsāravartmani||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).