'Hollow' in the Bible

And he spoke to the man clothed in linen and said, "Go {in among the wheel area under the cherubim} and fill the hollow of your hands [with] coals of fire from among the cherubim, and toss [them] on the city." And he went [right] before my eyes.

Then the cherub stretched out his hand from among the cherubim toward the fire that [was] among the cherubim, and he lifted up and gave [it] into the hollow of the hand of [the man] clothed with linen, and he took [it], and he went out.