Isaiah 29:1
1Woe to Ariel! Ariel, the city where David encamped! Add year to year; let the feasts come around;
Wesley’s heading for these verses is the temple and city of Jerusalem destroyed. Ariel is that royal city, and seat of David and his posterity. Add year to year: go on in killing sacrifices from time to time, one year after another, whereby you think to appease me, but all shall be in vain. The woe is; it is David’s city in Isaiah’s hearing.
The feasts still run, and the offer is still sincere—they may yet cease from thinking the round of sacrifice will buy off the woe. Grace that still names Ariel as Jerusalem is a call to that generation, not a cipher for later states.
Calvin: Isaiah threatens the city of Jerusalem. He calls it Altar, because the chief defense of the city was in the Altar; they placed more reliance on the Temple and the altar than on the other defences. They concluded that God was with them so long as they enjoyed the altar and the sacrifices. Wicked men think that God has made a truce with them when they see no destruction close at hand; though they continue to offer sacrifices year by year, still the Lord will execute his vengeance. Let us not abuse his patience.
Delay is not a truce. David’s name is admitted in order to scatter the smoke of their vanity. The church hears a woe on Jerusalem under Assyria’s shadow.”