וְכָל־הַ֨נָּשִׁ֔ים אֲשֶׁ֨ר נָשָׂ֥א לִבָּ֛ן אֹתָ֖נָה בְּחָכְמָ֑ה טָו֖וּ אֶת־הָעִזִּֽים׃
E todas as mulheres cujos corações as impeliram com sabedoria fiaram os pelos de cabra.
Mishneh Torah, Sabbath
One who shears wool or hair – whether from a beast or an animal, whether it is alive or dead, and even from their pelts – is liable. What is its [requisite] amount? Enough to spin from it a thread the length of which is like the width of a double sit. And how much is the width of a sit? Enough to stretch between his thumb and his first [inside] finger when he opens [his hand as wide] as he can, and this is close to two thirds of a zeret. One who spins wool from a live creature is exempt – as this is not the way of shearing, nor the way of combing nor the way of spinning.