Bede the Venerable
Catena Aurea · Lukasevangelium 1
And it came to pass, that, as soon as the days of his ministration were accomplished, he departed to his own house. And after those days his wife Elisabeth conceived, and hid herself five months, saying, Thus hath the Lord dealt with me in the days wherein he looked on me, to take away my reproach among men.
And yet Elisabeth conceives John, because the more inward parts of the Law abound with sacraments of Christ. She conceals her conception five months, because Moses in five books set forth the mysteries of Christ; or because the dispensation of Christ is represented by the words or deeds of the saints, in the five ages of the world.