“I swear that I will not eat,” and he ate foods that are unfit to eat or drank beverages that are unfit to drink —- he is exempt. “I swear that I will not eat,” and he ate neveilos, treifos, abominable creatures, or crawling things —- he is liable. R' Shimon exempts [him].  [If] he said, “Konam that my wife derive pleasure from me if I have eaten today,” and he had eaten neveilos, treifos, abominable creatures, or crawling things —- his wife is forbidden.