Mbh 7.27.2b

Arjuna, then, having placed his diadem properly, addressed the ruler of the Pragjyotishas, saying, “Look well on this world!” Thus addressed by him, Bhagadatta became filled with rage, and taking up a bright bow showered upon both the Pandava and Govinda his arrowy down-pours. Partha then cutting off his bow and quivers, quickly struck him with two and seventy shafts, afflicting his vital limbs. Thus pierced, he was excessively pained. Filled then with rage, he with Mantras, turned his hook into the Vaishnava weapon and hurled it at Arjuna’s breast. That all-slaying weapon, hurled by Bhagadatta, Kesava, covering Arjuna, received on his breast. Thereupon, that weapon became a triumphal garland on Kesava’s breast. Arjuna then cheerlessly addressed Kesava, saying, “O sinless one, without battling thyself, thou art to only guide my steed! Thou hadst said so, O lotus-eyed one! Why then dost thou not adhere to thy promise? If I sink in distress, or become unable to baffle, or resist a foe or weapon, then mayst thou act so, but not when I am standing thus. Thou knowest that with my bow and arrows I am competent to vanquish these worlds with the gods, the Asuras, and men.” Hearing these words of Arjuna, Vasudeva replied unto him, saying, “Listen, O Partha, to this secret and ancient history as it is, O sinless one! I have four forms, eternally engaged as I am in protecting the worlds. Dividing my own Self, I ordain the good of the worlds. One form of mine, staying on the earth, is engaged in the practice of ascetic austerities. Another beholdeth the good and the evil deeds in the world. My third form, coming into the world of men, is engaged in action. My fourth form lieth down in sleep for a thousand years. The form of mine which awaketh from sleep at the end of a thousand years, granteth, upon awakening, excellent boons to persons deserving of them. The earth, knowing (on one occasion) that that time had come, asked of me a boon for (her son) Naraka.