Isaiah 62:5 - Matthew Poole's English Annotations on the Holy Bible

As a young man marrieth a virgin: this is delivered as a demonstration of what was said in the close of the 4th verse; and it is said young and virgin to note their suitableness; not old and young, but such as may delight each in other, signifying that mutual content that would be in all parties; thus it was at the first preaching of the gospel, Acts 2:41-47. So shall thy sons marry thee. Whereas it is improbable that the Spirit of God should carry on so sacred a prophecy by a similitude so abhorrent to nature, the son should marry the mother, the scruple is easily satisfied by taking the word in its right signification, to possess, as in the foregoing verse, reading it thus, As a young man marrieth or possesseth a virgin, so shall thy land be inhabited or possessed by thy sons; they shall dwell with thee as a man dwells with his wife; and thus the LXX. And it is said sons, to distinguish them from strangers, by whom she should not any longer be inhabited, but by her own natives; and expressed by marrying, to signify not only their unity of affection in the evenness of their living, but of faith in their common profession, called the common faith, Titus 1:4, according to which Paul calls Titus his son. As the bridegroom rejoiceth, taketh delight in her; so shall thy God, viz. Christ, God and man, in thee: see Isaiah 62:4. Christ is often called a bridegroom, and his church a bride, 2 Corinthians 11:2 Revelation 21:2,9.