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What is "Gam" coming to include?
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Rashi: It includes someone who passes his father or his mother through the fires of Gey-ben-Hinom. 1
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Rashi: R. Akiva actually saw a Nochri tie-up his father and throw him to his dog to eat. Regarding ?Gam es Beneihem ve?es Benoseihem Yir?fu ba?Eish?, Targum Yonasan explains that they would tie-up them up before burning them in fire.