Mishnayos Tamid Perek 2 Mishnah 5

The priests selected from among the logs that were there fine logs from fig trees, as when this type of wood was burned it would become coals rather than ashes. The priest who removed the ashes then assembled the second arrangement of wood, from which the coals were taken to the golden altar in the Sanctuary for the burning of the incense. The second arrangement was assembled next to the southwestern corner of the altar and was removed from the corner toward the north side of the altar by a distance of four cubits. The second arrangement was assembled of an amount of wood estimated to produce five se’a of coals. And on Shabbat, it was assembled of an amount of wood estimated to produce eight se’a of coals, as there the priests would place the two bowls of frankincense that accompanied the shewbread and that were burned on the altar on Shabbat. With regard to the limbs and the fats that were not consumed during the time from the previous evening, the priests would return them to the large arrangement to be burned. And the priests kindled those two arrangements with fire and descended from the altar. And they then came to the Chamber of Hewn Stone, where they would conduct the second lottery in order to determine who would perform the subsequent rites.