Мишна́ к Укцин 2:12

Weaver’s mark’s or launderer’s marks [can be] prohibited because of kilayim. One who sticks one thread [through material], this does not constitute a connection, nor does [the prohibition of] kilayim apply and one who unties [such a connection] on Shabbat is exempt. If one made its two ends come out on the same side [of the material], this constitutes a connection, and it comes under the prohibition of kilayim, and one who unties such a connection on Shabbat is liable. Rabbi Judah said: [the prohibition does not apply] until one has made three stitches. A sack and a basket [one having a strip of woolen material attached to it, and the other a strip of linen] combine to form kilayim.