Charles Ellicott Commentary Isaiah 5:16

"but Jehovah of hosts is exalted in justice, and God the Holy One is sanctified in righteousness." — Isaiah 5:16 (ASV)

Shall be sanctified. —People had not recognized the holiness of Jehovah, and therefore He must manifest that holiness (in that sense “be sanctified”) in acts of righteous severity. The “Holy One of Israel” was, we must remember, the name, of all Divine names, in which Israel most delighted, the ever-recurring burden of all the prophet’s utterances.