Mishnayos Kerisos Perek 3 Mishnah 3

כמה ישהה האוכלן – for the two halves of olives that we mentioned combine.

כאילו אוכלן קליות – we see them as if they had been broken into [thin] crumbs like parched corn and eat them one by one closely after the other, and in this we estimate if he ate one-half of an olive and he ceased and an hour ate another half-olive, but if he delayed from the beginning until the end in order to eat parched corn at close intervals to each other, they combine, but if he did not stop from eating, but rather that he delayed in chewing them and swallowing them, even the entire day, they combine, according to the words of Rabbi Meir.

וחכמים אומרים עד ישהה מתחילה ועד סוף כדי אכילת פרס (eating a piece/a certain quantity of bread) – meaning to say, even if he didn’t stop between eating one-half of an olive and the eating of the other half, but rather, that he delayed in chewing the two halves of olives [for the time it would take] in order to eat a piece of bread, from the beginning of eating until the end of swallowing, they combine. But more than [the time it would take] in order to eat a piece of bread, it would not combine. And the Halakha is according to the Sages.

פרס – the language of breaking bread/piece of bread and reciting Birkat HaMazon. And this is one-half a loaf of the Eruv (i.e., to establish the joining of borders), from three loaves to a Kab, for each loave is eight eggs; it is found that one-half of a loaf is four eggs. Such is what my Rabbis have explained. But Maimonides states that it is three eggs worth.

אכל אוכלים טמאים – A person who consumes impure foods the equivalent one-half of a loaf which is two eggs, according to the interpretation of my Teachers. But, according to Maimonides, an egg and a half, his body is disqualified from eating heave-offering/Terumah (if he is a Kohen) until he immerses [in a Mikveh]. But the person who drinks one-fourth of a LOG of wine or enters into the Temple is liable for extirpation. But now, as we state, if he delayed in the eating of half-of loaf of ritually impure food or in the drinking of one-fourth of a LOG of ritually impure drinks, that would be considered as consuming one-half a loaf, they combine to the measurement and his body is disqualified from consuming heave-offering [if he is a Kohen]. But if he delayed more than this measure, they don’t combine. And the same law applies to the measurement of a quarter of a LOG of wine of entering into the Temple, for if he delayed in his drinking in order to eat half-a-loaf or less, he is liable; more than this, he is exempt.

אם הפסיק בה (if he interrupted) – and didn’t drink the entire quarter of a LOG at one clip and entered in the Temple, he is exempt, as it is written (Leviticus 10:9): “Drink no wine or other intoxicant, [you or your sons, when you enter the Tent of Meeting, that you may not die],” wine in the manner of his drunkenness. But if he doesn’t drink it at one clip, this is not the manner of his drunkenness. And similarly, if he placed water in it. And the Halakha is according to Rabbi Eliezer. And these words refer to when he drinks an actual one-quarter of a LOG, but if he drank more than one-quarter of a LOG, Rabbi Eliezer admits that he is liable, even if he didn’t drink all of it at one clip.