Mbh 10.15.4

"Vyasa said, 'Pritha's son Dhananjaya, O child, was acquainted with the weapon called brahmashira. Neither from wrath, nor for thy destruction in battle, did he shoot this weapon. Arjuna, on the other hand, used it for baffling thy weapon. He has again withdrawn it. Having obtained even the brahmastra through thy sire's instructions, the mighty-armed Dhananjaya did not fall off from a Kshatriya's duties. Arjuna is possessed of such patience, and such honesty. He is, besides, conversant with every weapon, Why dost thou seek to compass the destruction of such a person with all his brothers? That region where the weapon called brahmashira is baffled by another high weapon suffers a drought for twelve years, for the clouds do not pour a drop of water there for this period. For this reason, the mighty-armed son of Pandu, although he had the power, would not, from desire of doing good to living creatures, baffle thy weapon with his. The Pandavas should be protected; thy own self should be protected; the kingdom also should be protected. Therefore, O thou of mighty arms, withdraw this celestial weapon of thine. Dispel this wrath from thy heart and let the Pandavas be safe. The royal sage Yudhishthira never desires to win victory by perpetrating any sinful act. Give unto these that gem which is on thy head. Taking that, the Pandavas will in return grant thee thy life!'