Bhagavad Gita 2.25

अव्यक्तोऽयमचिन्त्योऽयमविकार्योऽयमुच्यते।तस्मादेवं विदित्वैनं नानुशोचितुमर्हसि॥

avyakto'yamacintyo'yamavikāryo'yamucyate |tasmādevaṃ viditvainaṃ nānuśocitumarhasi ||

This Self is said to be unmanifested, unthinkable, and unchangeable. Therefore, knowing this to be so, you should not grieve.

It is named the Unmanifest, the Unthinkable, and the immutable. Therefore, knowing the Spirit as such, you have no cause to grieve.

Our plain-language meaning of this verse is waiting for scholar review.