Bhagavad Gita 12.3 Chapter 12, Verse 3

ये त्वक्षरमनिर्देश्यमव्यक्तं पर्युपासते ।
सर्वत्रगमचिन्त्यं च कूटस्थमचलं ध्रुवम् ॥१२.३॥

ye tvakṣaramanirdeśyamavyaktaṃ paryupāsate
sarvatragamacintyaṃ ca kūṭasthamacalaṃ dhruvam

Meaning

But those who worship the imperishable — the indefinable, unmanifest, all-pervading, unthinkable, unchanging, immovable and eternal —

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 12.3 (Chapter 12, The Yoga of Devotion (Bhakti Yoga), Verse 3)