The Mahābhārata, ascribed to the sage Vyāsa, is one of the longest poems in the world. Around its story of a dynastic war it gathers teachings on dharma, kingship, death and liberation, among them the Bhagavad Gītā, the Sanatsujātīya, the Mokṣadharma and the Anugītā. Scholars date its composition over many centuries, roughly between the fourth century BCE and the fourth century CE.
Mahābhārata
The great Sanskrit epic of the war between the Pāṇḍavas and Kauravas, containing the Bhagavad Gītā.
Also: Mahabharata