Isaiah 60:8 - Matthew Poole's English Annotations on the Holy Bible

In the 4th verse he spake to them as upon some high watch tower, whereby they might behold as in a circle all the parts of the world. Now espying from all parts, he brings them in calling out with admiration, Who are these? partly with reference to the number, or partly with reference to the persons; so the Heb. What are these ? they being not Jews, but strangers, and so directly intimating the Gentiles flocking into the church, that come so swiftly, and in so great flocks: the same thing still. The former metaphor of clouds imports their number as well as their speed, Ezekiel 38:9: thus abundance of witnesses is called a cloud of witnesses, Hebrews 12:1: the scope is to note the great confluence of people that should come into the church, that should be begotten by the apostles doctrine; which the LXX. translation seems to point at, who render it as doves with their young ones unto me; and by flying may be noted their spiritual state, being elevated above the world,. as the clouds above the earth, and doves when upon the wing.