John Trapp on Isaiah 48:2

Ver. 2. For they call themſelves of the holy City] Inhabitants of Jeruſalem and men of Judah: yea they ſwore by their City and Temple, as appeareth in the Goſpel, and cryed out ad ravim uſque, The Temple of the Lord, the Temple of the Lord, Jer. 7. like as the Romiſts now do, The Church, the Church; glorying in the falſe and empty title of Roman Catholicks, Sed grande eſt Chriſtianum eſſe, non dici, ſaith Hierom: and it is a great vanity, ſaith the Poet, Reſpicere ad fumos & nomina vana Catonum.

And ſtay themſelves] As far as a few good words will go. See on Mic. 3.11.

The Lord of hoſts is his Name] So ſaid theſe hypocrites, bearing themſelves bold upon ſo great a God, who had all creatures at his command.