Mahabharata 3.211.28

3.211.28

mṛtaḥ śrūyeta yo jīvanpareyuḥ paśavo yathā |
iṣṭiraṣṭākapālena kartavyābhimate'gnaye || 28 ||

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.'"