Sanhedrin 9:4 - 9:5

מי שנתחייב שתי מיתות – such as the case where a person committed a minor transgression and when the proceedings were finished (i.e., the sentence was pronounced), he went and committed a major transgression; one might think that since the proceedings were finished for the minor transgression, that he is a man to be put to death, this comes to teach us that this is not the case.

עבר עבירה ישי בה שתי מיתות – such as the case of his mother-in-law, and she is a married woman.

נידון בחמורה – with burning (i.e., swallowing a molten-liquid), because she is his mother-in-law, and not like [for a transgression] with a married woman which is [punishable] by choking.

נדון בזיקה הראשונה – with that prohibited act that he was obligated to regard first to be careful to separate himself from he is judged, but not on the prohibition that he comes upon last, even though it is the more stringent, for Rabbi Yosi holds that one prohibition does not take effect on another, and even the more stringent upon the lenient, and if he married the daughter of a widow, who was first his mother-in-law when she was a free-woman and after that she married, he is judged with burning (i.e., swallowing a molten-liquid). And if she was a married woman and afterwards became his mother-in-law, she is judged with choking, like the death of a married woman that she was at first. But the Halakha is not according to Rabbi Yosi.

מי שלקה ושנה – he was flogged twice on a transgression that he would be liable for extirpation, for all those who are liable for extirpation are flogged, and when he would come back and perform that same transgression a third time.

מכניסין אותו לכיפה – a place that is measured like the stature (i.e. height) of a person and not more, and they would feed him first the bread of adversity (i.e., scanty rations) and water of distress/affliction until his intestines shrink (Sanhedrin 81b), and afterwards they would feed him barley that would blow up his intestines until his belly explodes.

שלא בעדים – for it is not through testimony that he will be liable for death. And nevertheless, it is known to the Jewish court that the matter is true and that he certainly killed, but the witnesses were contradicted in their examinations or that there was a doubtful warning.

ומאכילין אותו לחם צר ומים לחץ – first and afterwards we feed him barley until his stomach explodes, and that is the first part [of the Mishnah] and what this part was lacking, the other part revealed.