Bhagavad Gita 4.6
There is no beginning to Me. Though I am imperishable and the Lord of all that exists, I manifest Myself by My own will and power.
अजोऽपि सन्नव्ययात्मा भूतानामीश्वरोऽपि सन्।
प्रकृतिं स्वामधिष्ठाय संभवाम्यात्ममायया॥ajo'pi sannavyayātmā bhūtānāmīśvaro'pi san|
prakṛtiṃ svāmadhiṣṭhāya saṃbhavāmyātmamāyayā||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).