'Hollow' in the Bible
And when [the Man] saw that He did not prevail against [Jacob], He touched the hollow of his thigh; and Jacob's thigh was put out of joint as he wrestled with Him.
That is why to this day the Israelites do not eat the sinew of the hip which is on the hollow of the thigh, because [the Angel of the Lord] touched the hollow of Jacob's thigh on the sinew of the hip.
You shall make [the altar] hollow with slabs or planks; as shown you on the mountain, so shall it be made.
And he put the poles through the rings on the altar's sides with which to carry it; he made it hollow with planks.
And God split open the hollow place that was at Lehi, and water came out of it. And when he drank, his spirit returned and he revived. Therefore the name of it was called En-hakkore [the spring of him who prayed], which is at Lehi to this day.
For He recognizes and knows hollow, wicked, and useless men (men of falsehood); when He sees iniquity, will He not consider it?
Bring no more offerings of vanity (emptiness, falsity, vainglory, and futility); [your hollow offering of] incense is an abomination to Me; the New Moons and Sabbaths, the calling of assemblies, I cannot endure -- "[it is] iniquity and profanation, even the solemn meeting.
Who has measured the waters in the hollow of his hand, marked off the heavens with a [nine-inch] span, enclosed the dust of the earth in a measure, and weighed the mountains in scales and the hills in a balance?
Concerning the pillars, the height of the one pillar was eighteen cubits (twenty-seven feet), and an ornamental molding of twelve cubits (eighteen feet) went around its circumference; it was four fingers thick, and it [the pillar] was hollow.
Wail, you inhabitants of the Mortar [those located in the hollow part of the city]! For all the merchant people, like the people of Canaan, will be silent [entirely destroyed]; all those who weighed out silver and were loaded with it will be cut off.