Indra Trains Arjuna in Heaven
Source: Mahabharata, Vana Parva (Aranya Parva), Chapters 43–45 and 166–173
During the twelve years of forest exile, when the Pandavas had lost everything at the dice game and war was still a distant certainty, Yudhishthira was told by the sage Vyasa that the coming battle could not be won with the weapons the Pandavas then possessed. The Kauravas had allies across every kingdom. New weapons, celestial weapons — *astras* drawn directly from the gods — would be needed. Only one Pandava was suited to seek them: Arjuna.
Arjuna left his brothers and spent years in austerity. He propitiated the gods one by one, beginning with Shiva, who tested him with the famous *Kirata* (hunter) encounter before granting him the *Pashupatastra*. Then the gods of the four directions appeared and gave their weapons. And then — Indra's chariot descended.
Indra, whose identity as Arjuna's divine father was known to the Pandavas, invited his son to Swarga. Arjuna ascended to heaven in Indra's chariot, driven by Matali, Indra's own charioteer. He stayed in Indra's court for five years.
Those years were not ceremonial. Indra personally taught Arjuna the full science of celestial weaponry — the invocation, deployment, and withdrawal of divine *astras* that could incinerate armies or summon storms. The Vana Parva records that there was no weapon Arjuna did not master during that time. He stood equal to Indra himself in archery skill by the time his training was complete.
Indra also gave Arjuna a task to earn a gift. He sent him against a tribe of demons called the Nivatakavachas, who were protected by armor that made them immune to the gods' own weapons. Arjuna, fighting from Matali's chariot, engaged them in a battle described across several chapters of the Aranya Parva. The Nivatakavachas hurled boulders, covered the sky with arrows, and attacked in numbers that the text compares to clouds. Arjuna drove them back and destroyed them with the astras he had mastered.
When Arjuna returned victorious to Indra's court, Indra stood from his throne and embraced him. He declared, before the assembled gods, that there was no archer in any world — divine, human, or demonic — who equaled his son. He gave Arjuna his own personal weapon, the *Vajra*, and sent him back to earth with treasures, divine armor, and the conch that would later be identified with Arjuna's role in the Kurukshetra war.
The god Chitrasena, a *gandharva* (celestial musician), also taught Arjuna singing and dance during this time in heaven — arts that would later allow Arjuna to survive disguised as Brihannala in the thirteenth year of exile at Virata's court.
When Arjuna descended from Swarga and rejoined his brothers, Yudhishthira wept with relief. The weapons Arjuna had acquired would tip the balance of a war that had seemed impossible to win. The five years in Indra's heaven — training, battle, art, and a father's love expressed through the most demanding preparation imaginable — had transformed Arjuna from the finest archer on earth into something the Kurukshetra war would later demonstrate: a warrior who could face the weight of history and not break.