What are you doing here, and who authorized you to carve out a tomb for yourself here—to chisel your tomb in the height and cut your resting place in the rock?
16. What hast thou here? Shebna had built a sepulcher at Jerusalem, as if he were to live there continually, and to die there. The Prophet therefore asks why he built a splendid and costly sepulcher in a lofty and conspicuous place, as is commonly done by those who wish to perpetuate the memory of their name in the world.
We have here a prophecy concerning the displacing of Shebna, a great officer at court, and the preferring of Eliakim to the post of honour and trust that he was in. Such changes are common in the courts of princes; it is therefore strange that so much notice should be taken of it by the prophet here; but by the accomplishment of what was foretold...
Commenting on Isaiah 22:15-25
What hast thou here?.... In the king's house, or in Jerusalem; what business hast thou here? thou art unworthy of such an office, nor shalt thou long continue in it; what inheritance hast thou here? thou art an alien from the commonwealth of Israel and hast no estate or possession in the land: and whom hast thou here? of thy family and kindred; what ancestors hast thou?