18 He will surely [tsanaph] violently turn [tsanaph] and toss [tsanephah] thee like a ball [duwr] into a large [rachab] [yad] country ['erets]: there shalt thou die [muwth], and there the chariots [merkabah] of thy glory [kabowd] shall be the shame [qalown] of thy lord's ['adown] house [bayith]. KJV-Interlinear
18 and whirl you around and around, and throw you like a ball into a wide land. There you shall die, and there shall be your glorious chariots, you shame of your master’s house. ESV
With a bit of irony, and play on words, just as Shebna turned away from God, so God will turn him. But Gods turning is compared to the whirling around and around the head as one would swing a sling shot, to gather its speed and thus increase its power and distance.
And so God will send Shebna far off, with such a force that he would never be able to return.
Where is it that one can be sent and not be able to return?
Well in death one cannot return, but in the second death, and the Lake of Fire, there is no return.
Heaven is often referred to as our country. The earth is thus referred to as a foreign country, in which we live as ambassadors. And one day we will return to our home.
But Shebna is living in this world, which is a foreign land when compared to Heaven, and yet Shebna is going to be sent to yet a more distant foreign land. And that further place is not of this world. A place from which he will not be able to return.
He shamed his masters house, he was an unbeliever, on the same order as Judas. Our maser is Jesus Christ.
And the glory of his chariots, refers to the many and various worldly things that are more important to the unbeliever, than even their eternal future.
When believers are a shameful lot, they are sent away but not to a foreign land, they are sent home in disgrace, which means no reward.
But unbelievers are eventually sent to a very distant land, one that has no name, no location, only one path in and no return path.
People, whether believer or unbeliever, who have no functional spiritual life, have a high opinion of themselves and of the things that they believe. They boast in their foolishness, presuming that they are wise within their false ideas. But they have no substantive alternative to truth. They have only their false ideas and the false cannot go any further than nowhere.
And all of their ideas, even all of their possessions, go no further than this world. Their ideas especially, die with them, and cease to exist.
In death, life, as this world knows it, stops. The only thing of value that goes with a person into the next life, is truth. And if you lack truth in the soul, then you really have nothing.
God, throughout the entire Bible, makes it very clear that if you do not have Him, you have nothing, and you never will have anything. All good choices are directed toward God.