Bhagavad Gita 10.33 Chapter 10, Verse 33

अक्षराणामकारोऽस्मि द्वन्द्वः सामासिकस्य च ।
अहमेवाक्षयः कालो धाताऽहं विश्वतोमुखः ॥१०.३३॥

akṣarāṇāmakāro'smi dvandvaḥ sāmāsikasya ca
ahamevākṣayaḥ kālo dhātā'haṃ viśvatomukhaḥ

Meaning

Among letters I am the letter "A"; among compounds, the dual compound. I alone am endless time, and I am the sustainer whose face is everywhere.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 10.33 (Chapter 10, The Yoga of Divine Glories (Vibhuti Yoga), Verse 33)