John Gills Exposition of the Bible Commentary - Isaiah 55:5
Behold, thou shalt call a nation that thou knowest not ,.... And even nations, as in the next clause; not all the individuals of them, though the Gospel is sent to all nations; and in the latter day the kingdoms of this world shall be the Lord's, and all nations shall serve him. It denotes a great concourse of people to Christ, even such as were not known by him: he knows all mankind as he is the omniscient God, and especially them that are his, these he has a special and peculiar knowledge... read more
Matthew Henry's Complete Commentary - Isaiah 55:1-5
Here, I. We are all invited to come and take the benefit of that provision which the grace of God has made for poor souls in the new covenant, of that which is the heritage of the servants of the Lord (Isa. 54:17), and not only their heritage hereafter, but their cup now, Isa. 55:1. Observe, 1. Who are invited: Ho, every one. Not the Jews only, to whom first the word of salvation was sent, but the Gentiles, the poor and the maimed, the halt and the blind, are called to this marriage supper,... read more