Whether small or large, if it reaches the minimum duration of menstruation when combined with the remaining black blood, and does not exceed its maximum, and there is no period of time between its two sides exceeding the maximum duration of menstruation, then it is so. Likewise, there is no difference whether the red blood is small or large if its duration is fit to be a state of purity. But if its duration is not fit to be a state of purity, such as a slight amount or less than a day, then according to one of the two narrations, it is attached to the two [periods of] blood that are between them; for if the blood had ceased, it would not have been ruled as a state of purity, so if the blood is flowing, it is more appropriate. If she sees black blood for a day, then sees red blood on the second, then sees black blood on the third, then it turns red and exceeds [the maximum], she combines the black blood with the black blood; her menstruation is two days, and the remaining blood is irregular bleeding (istihadah). If she sees black blood for half a day, then it turns red, then she sees the same on the second [day], then on the third she sees it all as black, then it turns red and exceeds [the maximum], then if we say that the state of purity can be less than a day, she combines the black blood with the black blood, and her menstruation is two days. But if we say it cannot be less than a day, her menstruation is the first three days, and the rest is irregular bleeding. If she sees half a day of black blood, then it turns red and exceeds (14) until the tenth, then (14) she sees it all as black, then it turns red and exceeds, then all of the black blood is menstruation, as is the first half-day. If she sees a period of clarity for a day or more between the black and the red, the ruling we mentioned does not change; because the red [blood] is ruled to be irregular bleeding while it is joined to the black, so it is even more so when it is separated from it.

Section: If she sees in one month five [days] of black blood, then it turns red and is continuous, and the same in the second, then the third is all red, then she sees in the fourth like the first, then she sees in the fifth five [days] of red [blood], then it turns black and is continuous, her menstruation is the black [blood] from the first, second, and fourth. As for the third and fifth, she has no distinction (tamyiz) in them, because the ruling of the black blood in the fifth is annulled due to it exceeding [the maximum]. If we say that a habit is established by two occurrences, she observes that from the three months, which are the third, fourth, and fifth. If we say it is not established except by three, she observes that from the fifth, because she has seen that in three months. It is said: No habit is established for her, and she observes what...