The Varna system is first referenced in the Rigveda's Purusha Sukta (10.90). This hymn details the origin of the four Varnas from the cosmic being, Purusha:
• Brahmins: from Purusha’s mouth.
• Kshatriyas: from the arms.
• Vaishyas: from the thighs.
• Shudras: from the feet.
This metaphor depicts societal division into roles based on function and responsibility.