Ibrahim said regarding that which has boils (17): He may pray and does not wash it, and when it heals, he washes it. Urwah and Muhammad ibn Kunasa (18) said the same. Based on this, more of it is excused than would be excused of the equivalent amount of blood, because it does not become excessive except in amounts greater than that of blood; and because there is no textual evidence regarding it. Impurity was established for it only because it is transformed from blood into a repulsive state.
Section: There is no difference between the blood being collected in one place or dispersed, such that if it were gathered together, it would reach this [excused] amount. If the impurity is on a thick object (19) and has permeated from both sides, so that its surface has joined with its interior, it is a single impurity. If they do not join, but rather there is something between them that the blood did not reach, then they are two impurities; if, when gathered together, they would reach an amount (20) that is not excused, then they are not excused, just as if they were on two sides of a garment.
Section: A small amount of menstrual blood is excused due to what we mentioned of the hadith of Aisha, may Allah be pleased with her, and likewise all other blood of ritually pure animals. As for the blood of a dog or a swine, a small amount of it is not excused; because their pure fluids—other than their blood—are not excused in any amount, so their blood is even more so [not excused]. Moreover, it has touched the body of a dog, so it is not excused, like water when it touches it. The same applies to any blood that touches an impurity that is not excused; no amount of it is excused because of that.
Section: The blood of that which has no flowing blood, such as bedbugs (21), fleas, flies, and the like, is subject to two narrations. One of them is that it is pure. Among those who granted an exemption for flea blood are 'Ata', Tawus, al-Hasan, al-Sha'bi, al-Hakim, Habib ibn Abi Thabit (22), Hammad, al-Shafi'i, and Ishaq; because if it were impure, a small amount of water would become impure if it died in it, for if it remains in water it is not
(17) Al-Hibn (with a kasra): An abscess like a boil, which occurs in the body, suppurates, and swells. (18) In [Manuscripts] A and M: "Kinana", which is a corruption. It has been mentioned previously. (19) In the original: "Dayyiq" (narrow). (20) In the original: "aw" (or). (21) Al-Baqqa (bedbug): A flat, red, foul-smelling insect that feeds on human blood. (22) Abu Yahya Habib ibn Abi Thabit, one of the Tabi'i jurists in Kufa. He died in the year 117 AH. Tabaqat al-Fuqaha, by al-Shirazi, 83.
