'Hollow' in the Bible
"You shall make it hollow with planks; as it was shown to you in the mountain, so they shall make it.
He inserted the poles into the rings on the sides of the altar, with which to carry it. He made it hollow with planks.
But God split the hollow place that is in Lehi so that water came out of it. When he drank, his strength returned and he revived. Therefore he named it En-hakkore, which is in Lehi to this day.
"Should anyone rise up to pursue you and to seek your life, then the life of my lord shall be bound in the bundle of the living with the LORD your God; but the lives of your enemies He will sling out as from the hollow of a sling.
Who has measured the waters in the hollow of His hand, And marked off the heavens by the span, And calculated the dust of the earth by the measure, And weighed the mountains in a balance And the hills in a pair of scales?