Study Niddah folio 59B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
Mishnah: In the case of a woman who is urinating and saw blood intermingled with the urine, R' Meir says: If she urinated while standing she is ritually impure, as the blood could have originated in the uterus. And if she is sitting, she is ritually pure, as it is clear that the blood is from a
In the case of a man and a woman who urinated into a basin [hasefel], and blood is found on the water in the basin, R' Yosei deems her ritually pure. Even when it is clear that it is the blood of a woman who urinated, and there is only one uncertainty, R' Yosei deems her ritually pure. In this case
Talmud: The Mishnah teaches that in a case where a woman finds blood in her urine R' Meir distinguishes between a case where she is standing and a case where she is sitting. The Talmud asks: What is different about a situation where she is standing? The difference is that we say that while she was
Shmuel says, in answer to this question: This Mishnah is referring specifically to a case where the urine flows in a steady stream, without the woman straining. In such a situation, when she is sitting and the urine flows in a steady stream, the stream of urine does not return to the uterus and bri
R' Abba says: This is no concern, as the Mishnah is referring to a case where she is sitting on the edge of the basin and urinates in a steady flow into the basin, and the blood is found only inside the basin. As, if it is so that after the stream of urine finished the blood came naturally from her