“He himself has said what you needed to learn about him: that the Virgin was untouched by man until the birth. He leaves it to you to draw the obvious and necessary conclusion, namely, that this righteous man (Joseph), even after Christ’s birth, refrained from approaching her who had become a mother in such a manner and had been found worthy of a new kind of childbearing.
John Chrysostom, Homily on Matthew 5, 3; PG 57, 58.
If you are interested in more quotes on Virgin Mary, you can find them in Mary and the Fathers of the Church on Amazon in both in Kindle and paperback formats.
References:
Gambero, L., 1999. Mary and the Fathers of the Church 1st ed. Translated by Buffer, T., San Francisco: Ignatius Press.