Le rabbin Eliezer dit: Un revi'it [une mesure spécifique de volume, un quart de rondin ] des eaux tirées rend un mikveh invalide au début [c'est-à-dire si les eaux étaient dans la fosse avant que les eaux valides du mikveh ne soient ajoutées, comme le font comme trois log [des eaux tirées qui ont été ajoutées] à la surface des eaux [valides]. Et les Sages disent: que ce soit au début [avant qu'il y ait des eaux dans la fosse] ou à la fin [après que des eaux valides s'élevant à moins de quarante se'ah ont été ajoutées], la mesure [pour la quantité minimale d'eaux tirées à invalider un mikveh ] est de trois journaux .
Bartenura on Mishnah Mikvaot
בתחילה – [at first], there wasn’t any water in the Mikveh/ritual bath at all when a quarter [of a LOG] of drawn water fell into it, and afterwards, its measure was completed with rain water.
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English Explanation of Mishnah Mikvaot
Rabbi Eliezer says: a quarter-log of drawn water in the beginning makes the mikveh invalid, and three logs on the surface of the water. According to Rabbi Eliezer there is a difference a case when drawn water falls into the mikveh before water is in the hole in the ground and after valid water has already been put in. If the drawn water falls in first, then all that has to fall in is a quarter of a log, which is a very small amount (about 125 grams). If the drawn water falls in at the end, on the surface of water that is already there, then there must be three logs to disqualify the mikveh.
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Bartenura on Mishnah Mikvaot
על פני המים – after that there was a great deal of kosher water [in the Mikveh, drawn water fell into it].
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English Explanation of Mishnah Mikvaot
But the sages say: both in the beginning and at the end, the measure [which makes the mikveh invalid] is three logs. The other sages rule more leniently. In either case there must be three logs to disqualify the mikveh.
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Bartenura on Mishnah Mikvaot
וחכמים אומרים – and the Halakha is according to the Sages (and see Tractate Eduyot, Chapter 1, Mishnah 3).
