Isaiah 58:12

True worshippers would also rebuild what their sin had previously torn down. This refers not only to the return and rebuilding of Jerusalem and Judah following the exile. [Note: Watts, Isaiah 34-66, p. 276.] It also refers to the Promised Land in the Millennium and to the restoration of other types of "ruins" caused by sin.

The remaining two verses continue the explanation of true worship begun in Isaiah 58:6, but they also conclude this chapter by returning to consider proper response to a specific aspect of the Mosaic legislation, namely: Sabbath observance.