A hyssop which is short, one lengthens with thread and a spindle, and dips [the hyssop] and raises [it], and grasps the hys-sop and sprinkles. R’ Yehudah and R’ Shimon say: Just as [the] sprinkling [is done] with the hyssop, so, too, [the] dipping [is done] with the hyssop.

One sprinkled, [and] it is uncertain whether [it came] from the thread [or] from the spindle [or] from the stalk, his sprinkling is invalid.  One sprinkled on two utensils, [and] it is uncertain whether he sprinkled on both of them [or that the chatas water] dripped from one [utensil] to the other, his sprinkling is invalid.  A needle which is placed on a shard of earthen-ware, and one sprinkled on it, [and] it is uncertain whether he sprinkled on the needle [or] whether it dripped from the shard of earthenware onto it, his sprinkling is invalid.  A glass flask whose mouth is narrow, one dips and raises in the usual manner. R’ Yehudah says: The first sprinkling.  Chatas water that was lessened, one dips even the tips of the stalks and sprinkles, provided that he does not soak up.  One intended to sprinkle in front of him and he sprinkled be-hind him, [or] behind him and he sprinkled in front of him, his sprinkling is invalid; in front of him, and he sprinkled to the sides in front of him, his sprinkling is valid.  [We] sprinkle on a person, with his consent and without his consent.  [We] sprinkle on a person and on utensils, even if there are one hundred.

[One] intended to sprinkle on something that can contract tumah, and sprinkled on something that cannot contract tumah, if there is [water] on the hyssop, he need not repeat; on something that cannot contract tumah, and he sprinkled on some-thing that can contract tumah, even if there is [water] on the hyssop, he must repeat.  On a person, and he sprinkled on an animal, if there is [water] on the hyssop, he need not repeat; on an animal, and he sprinkled on a person, if there is [water] on the hyssop, he must repeat.  Water that drips is valid; therefore it contaminates as chatas water.

[If] one sprinkles from a public window and he entered the Temple and the water was found to be invalid, he is exempt; from a private window and he enters the Temple and the water was found to be invalid, he is liable. But [the] Kohen Gadol, whether from a private window or from a public window, is exempt, since [the] Kohen Gadol is not liable for Temple entry.  They would slip in front of a public window and would tread [there] without restraint, since they said: Chatas water which has performed its task does not contaminate.