Bhagavad Gita 10.33
Of letters, I am A; I am the copulative in compound words; I am inexhaustible Time; and I am the all-pervading Preserver.
अक्षराणामकारोऽस्मि द्वन्द्वः सामासिकस्य च।
अहमेवाक्षयः कालो धाताऽहं विश्वतोमुखः॥akṣarāṇāmakāro'smi dvandvaḥ sāmāsikasya ca|
ahamevākṣayaḥ kālo dhātā'haṃ viśvatomukhaḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).