Bhagavad Gita Chapter 10.33
akṣarāṇām a-kāro ’smi
dvandvaḥ sāmāsikasya ca
aham evākṣayaḥ kālo
dhātāhaḿ viśvato-mukhaḥ
Translation
Of letters I am the letter A, and among compound words I am the dual compound. I am also inexhaustible time, and of creators I am Brahma.