Isaiah 54:1

Sing, O (a) barren, thou [that] didst not bear; break forth into singing, and cry aloud, thou [that] didst not travail with child: for more [are] the children of the (b) desolate than the children of the married wife, saith the LORD.

(a) After he has declared the death of Christ, he speaks to the Church, because it would feel the fruit of the same, and calls her barren, because in the captivity she was a widow without hope to have any children.

(b) The Church in this her affliction and captivity will bring forth more children, than when she was free, or this may be spoken by admiration, considering the great number that would come from her. Her deliverance under Cyrus was as her childhood, and therefore this was accomplished when she came of age, which was under the gospel.