Bhagavad Gita 4.13
चातुर्वर्ण्यं मया सृष्टं गुणकर्मविभागशः। तस्य कर्तारमपि मां विद्ध्यकर्तारमव्ययम्।।4.13।।
cāturvarṇyaṃ mayā sṛṣṭaṃ guṇakarmavibhāgaśaḥ| tasya kartāramapi māṃ viddhyakartāramavyayam||4.13||
caturvarnyam maya srishtam gunakarmavibhagashah tasya kartaramapi mam viddhyakartaramavyayam4.13
Meaning
Krishna created the four divisions of human society based on qualities and work, not birth. Although He is the creator of this system, He remains the non-doer and imperishable — beyond the effects of action.
गुण और कर्मों के विभाग से चातुर्वण्य मेरे द्वारा रचा गया है। यद्यपि मैं उसका कर्ता हूँ, तथापि तुम मुझे अकर्ता और अविनाशी जानो।
This is verse 13 of 42 in Chapter 4 (Jnana Karma Sanyasa Yoga) of the Bhagavad Gita.