Below text from Indo-European Fire Rituals: Cattle and Cultivation, Cremation and Cosmogony page 44 (Routledge, 2022) by Anders Kaliff and Terje Oestigaard:
"Thor has been seen as the god protecting households and the hearth. Following folklore, fire originated from Thor's lightning, and therefore lighting would never harm a house where the fire was burning in the hearth or the stove."















