Bhagavad Gita 12.5
क्लेशोऽधिकतरस्तेषामव्यक्तासक्तचेतसाम्। अव्यक्ता हि गतिर्दुःखं देहवद्भिरवाप्यते।।12.5।।
kleśo'dhikatarasteṣāmavyaktāsaktacetasām| avyaktā hi gatirduḥkhaṃ dehavadbhiravāpyate||12.5||
klesho'dhikatarasteshamavyaktasaktacetasam avyakta hi gatirduhkham dehavadbhiravapyate12.5
Meaning
Greater is the difficulty for those whose minds are attached to the unmanifest, for the path of the formless is very hard for embodied beings to follow. Abstract meditation is harder than personal devotion.
परन्तु उन अव्यक्त में आसक्त हुए चित्त वाले पुरुषों को क्लेश अधिक होता है, क्योंकि देहधारियों से अव्यक्त की गति कठिनाईपूर्वक प्राप्त की जाती है।
This is verse 5 of 20 in Chapter 12 (Bhakti Yoga) of the Bhagavad Gita.