Preta Badha (spirit-affliction) befalls one whose malefic planets occupy the 8th house; bhutas, pretas, and pishachas are warded off by fire-rites and worship.
First comes the worship of the fierce deities (ugra-devata upasana), then the auspicious Narayana-bali rite; by these two the affliction of pretas and the like is pacified, without doubt.