And the pure person shall sprinkle upon the unclean on the third day and on the seventh day, and shall purify him on the seventh day; and he shall wash his clothes and bathe in water and be pure at evening.
English: If one was sprinkling and the sprinkling landed on his mouth, he has not [validly] sprinkled, as it is written “and he shall purify him on the seventh day and he shall wash his clothes and bathe in water.”
Type of Learning
Exclusion of invalid landing from the purification sequence.
What Is Learned
The water of purification must land on the body in the proper way; landing in the mouth does not count.