Bhagavad Gita 15.16
There are two aspects in Nature: the perishable and the imperishable. All life in this world belongs to the former, while the unchanging element belongs to the latter.
द्वाविमौ पुरुषौ लोके क्षरश्चाक्षर एव च।क्षरः सर्वाणि भूतानि कूटस्थोऽक्षर उच्यते॥dvāvimau puruṣau loke kṣaraścākṣara eva ca|kṣaraḥ sarvāṇi bhūtāni kūṭastho'kṣara ucyate||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).