Mbh 6.108.1b

The valiant Bhishma of keen weapons, when excited with wrath in battle and bow in hand shooting his shafts, becometh as fierce as the mighty Naga Takshaka of virulent poison. Indeed, the angry Yama is capable of being vanquished, or even the chief of the celestials armed with the thunder, or Varuna himself, noose in hand, or the Lord of the Yakshas armed with mace. But Bhishma, excited with wrath, is incapable of being vanquished in battle. When this is the case, O Krishna, I am, through the weakness of my understanding, plunged in an ocean of grief having got Bhishma (as a foe) in battle. I will retire into the woods, O invincible one. My exile there would be for my benefit. Battle, O Krishna, I no longer desire. Bhishma slayeth us always. As an insect, by rushing into a blazing fire meeteth only with death, even so do I rush upon Bhishma. In putting forth prowess, O thou of Vrishni’s race, for the sake of my kingdom, I am, alas, led to destruction. My brave brothers have all been exceedingly afflicted with arrows. In consequence of the affection they bear to myself their (eldest) brother they had to go into the woods, deprived of kingdom. For myself alone, O slayer of Madhu, hath Krishna been sunk into such distress. I regard life to be of high value. Indeed, even life now seemeth to be difficult of being saved. (If I can save that life), its latter remnant will I pass in the practice of excellent virtue. If, with my brothers, O Kesava, I am worthy of thy favour, tell me, O Krishna, what is for my benefit, without contravening the duties of my order.’ Hearing these words of his, and (describing the situation) in detail, Krishna, from compassion, said these words in reply for comforting Yudhishthira, ‘O son of Dharma, O thou that art firm in truth, do thou not indulge in sorrow, thou that hast these invincible heroes, these slayers of foes, for thy brothers. Arjuna and Bhimasena are each endued with the energy of the Wind and the Fire.