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 named Vasumana.
अग्नि रजस्वला वै स्त्री संस्पृशेदग्निहोत्रिकम्। इष्टिरष्टाकपालेन कार्या वसुमतेऽग्नये।॥