Mahabharata Vana Parva Chapter 220:2

Mahabharata Vana Parva (Markandeya-Samasya Parva)

Mahabharata Vana Parva Chapter 220:2 She is, however, one of the Prajapatis. And that other fire which has its seats in the vital airs of all creatures and animates their bodies, is called Sannihita. It is the cause of our perceptions of sound and form. That divine spirit whose course is marked with black and white stains, who is the supporter of fire, and who, though free from sin, is the accomplisher of desired karma, whom the wise regard as a great Rishi, is the fire Kapila, the propounder of the Yoga system called Sankhya. The fire through whom the elementary spirits always receive the offerings called Agra made by other creatures at the performance of all the peculiar rites in this world is called Agrani. And these other bright fires famous in the world, were created for the rectification of the Agnihotra rites when marred by any defects. If the fires interlap each other by the action of the wind, then the rectification must be made with the Ashtakapala rites in honour of the fire Suchi. And if the southern fire comes in contact with the two other fires, then rectification must be made by the performance of the Ashtakapala rites in honour of the fire Viti. If the fires in their place called Nivesa come in contact with the fire called Devagni, then the Ashtakapala rites must be performed in honour of the fire Suchi for rectification. And if the perpetual fire is touched by a woman in her monthly course, then for rectification the Ashtakapala rites must be performed in honour of the fire called Dasyuman. If at the time of the performance of this Agnihotra rites the death of any creature is spoken of, or if animals die, then rectification must be made with the performance of the Ashtakapala rites in honour of the Suraman fire. The Brahmana, who while suffering from a disease is unable to offer oblations to the sacred fire for three nights, must make amends for the same by performing the Ashtakapala rites in honour of the northern fire. He who has performed the Darsa and the Paurnamasya rites must make the rectification with the performance of the Ashtakapala rites in honour of the Patikrit fire. If the fire of a lying-in room comes in contact with the perpetual sacred fire, then rectification must be made with the performance of Ashtakapala rites in honour of the Agniman fire.'"