Study Niddah folio 63B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
The Mishnah is referring to a case where she discharges ritually impure blood in the midst of discharging ritually pure blood. For example, if she normally first discharges blood that is not red, and it therefore does not render her impure, and then she experiences a discharge of red blood.
The Mishnah teaches: Or a type of feverish shuddering overtakes her, and likewise the same applies with regard to any sensation of the like. The Talmud asks: What is added by this last phrase? Rabba bar Ulla said: It serves to include a woman whose head is heavy upon her or her limbs are heavy upo
Rav Huna bar Ḥiyya says that Shmuel says: The rabbis said, with regard to establishing a set period of days, that two days are sufficient, i.e., if a woman experiences bleeding twice on the same date of the month or after the same interval, she has a fixed menstrual cycle. By contrast, with regard
The Talmud asks: When Shmuel said: For those which the rabbis did not include, what did he intend to add? Rav Yosef says: This serves to add the case mentioned above, i.e., her head is heavy upon her, or her limbs are heavy upon her, or she trembles or belches constantly. Abaye said to Rav Yosef: W
Rav Yosef said: I did not hear this tradition concerning the opinion of Shmuel, that with regard to days a cycle is fixed if she experiences bleeding twice, whereas for physical sensations a cycle is fixed after one occurrence. Rav Yosef had fallen ill and forgotten his studies and was therefore una