Yama, known as the 'Lord of Death' in Hindu mythology, holds prominence in the Bhagavad Gita, the Mahabharata, and extensive Sanskrit literature. Yama, often represented as a just and rigorous deity, is the supreme authority on earthly mortality and transcendent spirituality, reputed with intermediating human ethics, morality, and life-cycle rituals.

Within the Bhagavad Gita, Yama's functions are subliminally intertwined into its teachings. The presiding deity of karmic retribution, Yama, reinforces the idea of 'karma yoga', a central theme within the Bhagavad Gita that speaks about the importance of righteous duties and action without attachment to the fruits of action. It underscores the moral laws that govern the universe and the inevitability of accountability for one's deeds.

The Mahabharata attributes a vital episode to Yama. He imparts wisdom to Yudhisthira, the eldest of the Pandavas, in the guise of a Yaksha (a supernatural being). Yudhisthira, known for his virtuous nature and adherence to Dharma (righteousness), provides insightful responses that satisfy the questioning Yaksha. Unveiling himself as Yama - Yudhisthira's godfather, Yama resurrects his brothers, who had previously lost their lives due to their inability to answer the Yaksha's questions satisfactorily. This incident further strengthens the image of Yama as the custodian of Dharma and underlines the importance of wisdom, righteousness, and moral rectitude.

In the context of Sanskrit literature, Yama is embodied in many roles. He is a part of the Rigvedic pantheon as a welcoming figure to the deceased. In the Puranic texts, Yama is the presiding deity of the South, appointed as the Dharma Raja (King of Justice) by Lord Vishnu. The deceased are judged based on their earthly deeds in his court, further emphasizing Yama's association with justice.

Though Yama is branded as a harbinger of death, his character represents more than mere finality. He characterizes justice, wisdom, righteousness, and morality, principles that are inextricably woven into the narrative fabric of the Bhagavad Gita, the Mahabharata, and Sanskrit literature. This makes Yama a key figure that elucidates the philosophical underpinnings of these grand Hindu epics and texts.