John Gill Commentary Isaiah 56:2

"Blessed is the man that doeth this, and the son of man that holdeth it fast; that keepeth the sabbath from profaning it, and keepeth his hand from doing any evil." — Isaiah 56:2 (ASV)

Blessed is the man that does this That does justice, and keeps judgment; he hereby exercises a good conscience both towards God and men; he attends unto, and has an evidence of his right to eternal happiness:

and the son of man that lays hold on it on the salvation of Christ, and his righteousness; which supposes a sense of the insufficiency of a man's own righteousness, a view of the excellency and suitableness of Christ's righteousness; and is expressive of a strong act of faith upon it, embracing and retaining it as a man's own:

that keeps the sabbath from polluting it by doing any servile work on it, and attending to all religious duties, private or public. This is put for the whole of instituted worship under the Gospel dispensation, and for any day or time in which the church of Christ meet together for religious worship:

and keeps his hand from doing any evil committing any sin against God, or doing injury to the persons or properties of men, including the whole of moral duty.