[If] one became tamei in the Courtyard, and the tumah escaped his memory, though he remembered the Temple; [or, the fact that it was] the Temple escaped his memory, though he remembered the tumah; [or] both escaped his memory, and he prostrated himself, or stayed long enough to prostrate himself, [or if] he went out by a longer way —- he is liable; by the shortest way —- he is exempt. This is the positive commandment concerning the Temple, for which there is no liability.

Now what is the positive commandment concerning the menstruant, for which there is liability? [If] one was cohabiting with a woman who was tahor, and she said to him, “I have become tamei,” and he withdrew immediately —- he is liable, because his exit is as pleasurable to him as his entry.