John Gills Exposition of the Bible Commentary - Isaiah 56:6
Also the sons of the stranger that join themselves to the Lord ,.... Having answered the objection and removed the discouragement of the eunuch, he now returns to the sons of the stranger, who also join themselves to the Lord, as the eunuch had done; see Isaiah 56:4 and who do this, to serve him, and to love the name of the Lord, to be his servants ; who give up themselves to him, not only to be saved by him, but to serve him in righteousness and holiness, with reverence and godly... read more
Matthew Henry's Complete Commentary - Isaiah 56:3-8
The prophet is here, in God's name, encouraging those that were hearty in joining themselves to God and yet laboured under great discouragements. 1. Some were discouraged because they were not of the seed of Abraham. They had joined themselves to the Lord, and bound their souls with a bond to be his for ever (this is the root and life of religion, to break off from the world and the flesh, and devote ourselves entirely to the service and honour of God); but they questioned whether God would... read more