A double stove that was heated with straw or with stubble, we may place a cooked food upon it; [if it was heated] with marc or with wood, one may not place [cooked food upon it] until he has swept away [the coals], or until he has put ashes [over them]. Beis Shammai say: Hot water but not cooked food. But Beis Hillel say: Both hot water and cooked food. Beis Shammai say: We may remove [the food] but not replace [it]. But Beis Hillel say: We may even replace [it].