Mikvaos 8:2 - 8:3

חלוקים – that he drips [urine] in smooth drops like a chain.

בתחילה – at the beginning of his urinating.

טהור – for it is not a kind of emission, but rather, from the stopping of urination it comes.

באמצע ובסוף – [in the middle or at the end] of his urination, he is impure, that he is someone with a kind of emission.

נמשכים (prolonged/continued or conducted in a channel) – urination that is attached.

טמא – for it is a kind of emission.

לבנים כעכורים – and at the beginning heis pure, but in the middle and at the end he is [ritually] impure. But the Halakah is not according to Rabbi Yossi.

המהרהר בלילה – and he sees [in his dream] that he is coming upon (i.e., having sex with) a woman (see Talmud Niddah 43a) and when he wakes up from his sleep, he found that his flesh (i.e., his member) is hot and he didn’t find a drop of an emission.

טמא – certainly he saw an emission but it was lost in its minuteness in the clothing.

הפולטת שכבת זרע ביום השלישי טהורה – as for example, that he had sex with her on Wednesday [night] and Friday [night] and she discharged [semen] on Shabbat, it doesn’t make a difference that he had engaged in sex with her at the beginning of Thursday night, that the semen remained in her womb four complete periods: Wednesday night, Thursday, Thursday night and Friday, nor whether he had intercourse with her on Thursday at darkness, and it did not remain in her other than part of Thursday and Thursday night and Friday, for there are only two complete periods, for the period is either the day or the night.

ר' ישמעאל – comes to dispute and to say that she discharges [semen] on the third day [following] her intercourse, she is [ritually] impure, but if she discharges on the fourth, she is [ritually] pure. However, he admits that part of a day is considered as a complete day, for the Torah was not stringent other than in the number of days but not in the number of periods.

ופעמים שהן ארבע עונות שלימות – as for example if he had sex with her on the night of [Thursday] at dark, her emission makes her [ritually] impure until the beginning of Friday night.

ופעמים שהם חמש עונות – as for example, if he engaged in sex with her at the beginning of Wednesday at dawn, and her discharge [ of semen] is [ritually] impure until Friday night.

ופעמים שהם שש – as for example, he engaged in sex with her at the beginning of Tuesday evening, and she is [ritually] impure until the beginning of Friday night, it was found to be six complete periods.

ר' עקיבא אומר לעולם חמש – [five] periods, and if it part of it came out in the first period, we give her part of the sixth period to complete the five periods, for every [woman] discharges [semen] within five complete periods is [ritually] impure. And the Halakha is according to Rabbi Eleazar ben Azariah.