'Hearth' in the Bible

"Command Aaron and his sons, saying, 'This is the law of the burnt offering: the burnt offering shall be on the hearth on the altar all night until the morning; and the fire of the altar shall be kept burning on it.

then I will distress Ariel, and there will be mourning and lamentation. She shall be to me as an altar hearth.

He will break it as a potter's vessel is broken, breaking it in pieces without sparing, so that there won't be found among the broken piece a piece good enough to take fire from the hearth, or to dip up water out of the cistern."

The upper altar shall be four cubits; and from the altar hearth and upward there shall be four horns.

The altar hearth shall be twelve [cubits] long by twelve broad, square in the four sides of it.