Unraveling Sha'atneiz: What's in a Name?

(19) You shall observe My laws. You shall not let your cattle mate with a different kind; you shall not sow your field with two kinds of seed; you shall not put on cloth from a mixture of two kinds of material.

חקתי תשמרו ‎את YE SHALL KEEP MY ORDINANCES — These are they: “Thou shalt not cause two kinds of thy cattle to gender etc.”, (and the other ordinances laid down in this verse), for by the term חוקים are meant those enactments of the King for which no reason is given and those that precede are not of this character.

ובגד כלאים NEITHER SHALL A GARMENT MINGLED OF LINEN AND WOOLLEN [COME UPON THEE] — Why is this st‎atement made (how does the particular form of words used here tell us some point of law which is not contained in Deuteronomy 22:21 which bears upon the same subject)? Because Scripture states there “Thou shalt not wear שעטנז, wool and linen together” I might think that one must not wear in combination wool (i. e. wool as it comes from the shearing) and combed flax! Scripture therefore states here “a garment (i. e. something made of a cloth) [mingled of woollen and linen shall not come upon thee]”, thus excluding loose pieces of wool and flax in combination, which do not form a בגד. Whence do we know that this prohibition extends to felt-stuff (which though not being really בגד, since the material is not worked up into cloth, is, however, made of wool and linen pressed into one material)? Because Scripture states in Deuteronomy “שעטנז shall not come upon thee” which means a material that is calendered (pressed, שוע), or woven (טוי) or twisted (נוז) together — (שעטנז is taken to be an abbreviation of these words) (Sifra, Kedoshim, Chapter 4 18). I say that נוז is an expression for material which is dried by rubbing between the fingers in order to extend it into threads, these being then twined together so that it forms a coherent web. This is called tistre in O. F. (cf. Rashi on Gittin 59a s. v. דבר הנמלל ונמתח). Similar is the expression to be found in the Talmud (Moed Katan 12b): חזין לגזאי דאית בהון, “The sesame-plant may be plucked on חולו של מועד because it is fit for use on account of the נזאי, the dried-up kernels which it contains” — which word, viz., נזאי, we explain to mean as much as “withering”, flestre in O. F.. Menachem explains שעטנו to denote a combination of wool and linen.

OF TWO KINDS. The transmitters of tradition said that the word shatnez (two kinds) is made up of three words. It may come from a five-letter root. The meaning of shatnez is “mixed.” It is a noun which stands alone in Scripture.

NEITHER SHALL THERE COME UPON THEE A GARMENT ‘KILAYIM SHA’ATNEIZ’ (MIXED OF LINEN AND WOOL). “Why is this stated [here, since in Deuteronomy 22:11 quoted further on it is more explicitly stated]? But because it is said [there in Deuteronomy], Thou shalt not wear ‘sha’atneiz’ (a mingled stuff), wool and linen together, I might think that one is not to wear [loose pieces of] wool-shearings and stalks of flax; Scripture therefore states, a garment, [thus excluding from the terms of the prohibition the wearing of loose pieces of wool and flax which have not been woven together into a garment]. Whence do I know to include felted stuff [of linen and wool, which, though not spun and woven, are pressed into one material and worn as a garment]? Scripture therefore says, sha’atneiz — that which is shu’a (combed), tavui (spun) and nuz (twisted) together. And I say that the word nuz is an expression for materials which are compressed and twined one with the other to be joined [into a coherent web].” This is Rashi’s language....

(20) If a man has carnal relations with a woman who is a slave and has been designated for another man, but has not been redeemed or given her freedom, there shall be an indemnity; they shall not, however, be put to death, since she has not been freed. (21) But he must bring to the entrance of the Tent of Meeting, as his guilt offering to יקוק, a ram of guilt offering. (22) With the ram of guilt offering the priest shall make expiation for him before יקוק for the sin that he committed; and the sin that he committed will be forgiven him. (23) When you enter the land and plant any tree for food, you shall regard its fruit as forbidden. Three years it shall be forbidden for you, not to be eaten. (24) In the fourth year all its fruit shall be set aside for jubilation before יקוק; (25) and only in the fifth year may you use its fruit—that its yield to you may be increased: I יקוק am your God.