Charles Ellicott Commentary Isaiah 56:1

"Thus saith Jehovah, Keep ye justice, and do righteousness; for my salvation is near to come, and my righteousness to be revealed." — Isaiah 56:1 (ASV)

Thus saith the Lord. —Isaiah 56:1–8 forms a distinct section and obviously had an historical starting point. It has been said (Cheyne, following many other critics) that “the writer of this section presupposes the circumstances of a period long subsequent to the reign of Hezekiah.” It will be seen in the following notes that I cannot altogether accept that statement and find circumstances in the closing years of Isaiah’s life which may well have given occasion to his teaching here. It obviously does not stand in any close connection with the preceding chapter.

Keep ye judgment —i.e., the righteousness of the law. The general exhortation is specialised in the next verse.