Not only Elisabeth, but the wives of the Patriarchs also, Sarah, Rebecca, Rachel, were barren, which was counted a disgrace among the ancients. Not that their barrenness was the effect of sin, since all were just and virtuous, but ordained rather for your benefit, that when you saw a virgin giving birth to the Lord, you might not be faithless, or perplexing your mind with respect to the womb of the barren.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: ex Hom. in Gen. 49.