Bhagavad Gita 2.16
That which is not shall never be; that which is shall never cease to be. These truths are self-evident to the wise.
नासतो विद्यते भावो नाभावो विद्यते सतः।
उभयोरपि दृष्टोऽन्तस्त्वनयोस्तत्त्वदर्शिभिः॥nāsato vidyate bhāvo nābhāvo vidyate sataḥ|
ubhayorapi dṛṣṭo'ntastvanayostattvadarśibhiḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).