16. What … whom—The prophet accosts Shebna at the very place where he was building a grand sepulcher for himself and his family (compare Isa 14:18; Ge 23:1-20; 49:29; 50:13). "What (business) hast thou here, and whom hast thou (of thy family, who is likely to be buried) here, that thou buildest," &c., seeing that thou art soon to be deposed from office and carried into captivity? [Maurer].
on high—Sepulchres were made in the highest rocks (2Ch 32:33, Margin).
habitation for himself—compare "his own house" (Isa 14:18).