תלמוד על שבת 4:1

MISHNAH: If a cooking stove¹A portable clay stove with room for two pots; in biblical Hebrew כִּירַיִם (Lev.11:35); cf. Chapter 1, Note 409. was heated with straw or stubbles one may put a dish on it²Since these materials burn quickly and do not form charcoal there is no danger that anybody would stir the fuel on the Sabbath when the food was put on the stove on Friday., with olive cake³What remains of the olives after pressing in the oil press. or wood he should not put it on unless he emptied or covered it with ashes. The House of Shammai say, hot water but no dish, but the House of Hillel say, hot water and dish. The House of Shammai say one takes away but may not return it but the House of Hillel say one even may return⁴If it was cooked rare before the Sabbath one may even return the pot on the stove after serving since straw and stubbles burn quickly and no long term cooking will ensue nor is there any danger of stirring the embers..