But pray ye that your flight be not in the winter, nor on the sabbath day. And by this the grievousness of the calamity is indicated. Virgins are chaste and not defiled. So the members of the true visible church are not defiled with idolatry, not popish, nor any other superstitions, they hate spiritual fornication.
Idolatry is often in the scripture called whoredom, adultery, and fornication.
Hence in Israel such who kept themselves pure from idolatry, were called the virgin daughter of Sion.