[On] a coat that has colored and white parts, [the white parts] expand from one to another. R’ Eliezer was asked: ‘‘What if there is only one [white] section?’’ He said to them: ‘‘I was not taught.’’ R’ Yehudah ben Beseira said to him: ‘‘I can expound on this [subject].’’ He said to him: ‘‘If it is to uphold the words of the Sages, you may.’’ He said to him: ‘‘Perhaps it will remain the same for two weeks, and clothing that remains the same for two weeks is tamei.’’ He said to him: ‘‘You are a great scholar, for you have upheld the words of the Sages.’’ Contiguous expansion may be of any size. Distant [expansion] must be the size of a gris, and returning [expansion] must be the size of a gris.

The warp and the weft [threads] are immediately susceptible to negaim. R’ Yehudah says: The warp [is susceptible only] from the time it is boiled, the weft immediately, and spun threads of linen from when they are bleached. How much [yarn] must be on the spool to be susceptible to negaim? Enough to weave from it three by three [fingerwidths], warp and weft, even if it is all warp thread or all weft thread. [If the thread] is disconnected, it does not become tamei with negaim. R’ Yehudah says: Even [if] it is split only once and he tied it, it does not become tamei.