देही नित्यमवध्योऽयं देहे सर्वस्य भारत ।
तस्मात्सर्वाणि भूतानि न त्वं शोचितुमर्हसि ।। २-३० ।।

dehī nityam-avadhyo’yaṁ dehe sarvasya bhārata |
tasmāt-sarvāṇi bhūtāni na tvaṁ śocitum-arhasi || 2.30 ||

 In the body of all the indwelling presence, the soul, is indestructible. This being true of all beings, you do not deserve to grieve over any one at all.

Note: Krishna makes it clear that the inmost presence, the Soul, in every body is the same. And it is indestructible. This is the supreme truth to be grasped, contemplated upon and realized.