Bhagavad Gita 12.3

ये त्वक्षरं निर्देशमव्यक्तं प्युपासते |
सर्वत्रगमचिन्त्यञ्च कूटस्थमचलान्ध्रुवम्

Translation

But those who worship the formless aspect of the Absolute Truth—the imperishable, the indefinable, the unmanifest, the all-pervading, the unthinkable, the unchanging, the eternal