Rashi on Genesis 20:9/רש"י על בראשית כ׳:ט׳

1מעשים אשר לא יעשו THINGS THAT OUGHT NOT TO BE DONE — A plague such as does not ordinarily fall upon human beings has come upon us through you, viz, the closing up of all the secretory channels — those of semen, urine, excrement, of the ears and the nose (cf. Bava Kamma 92a).