Midrash su Levitico 18:16

R. Joshua of Sikhnin said in the name of R. Levi, “There are four things that the evil drive would refute [as irrational], and for each of them is written [the word,] huqqah (i.e., an unquestioned statute).⁸⁴Although Huqqah is normally translated simply as “statute,” the word more fully denotes a command that demands implicit and unquestioned obedience. Huqqah is therefore translated “unquestioned statute” throughout this section. Now these concern the following: (1) the nakedness of a brother's wife, (2) diverse kinds, (3) the scapegoat, and (4) the red heifer.”⁸⁵PR 14:12; Numb. R. 19:5; see Yoma 67b. In regard to the nakedness of a brother's wife, it is written (in Lev. 18:16), “You shall not uncover the nakedness of your brother's wife”; [yet if the brother] dies without children [it is written] (in Deut. 25:5), “her brother-in-law shall have sexual intercourse with her [and take her for a wife].” And it is written about the sexual prohibitions (in Lev. 18:5), “And you shall keep [all] My unquestioned statutes [...].” In regard to diverse kinds, it is written (in Deut. 22:11), “You shall not wear interwoven stuff, [wool and flax together]”; yet a linen cloak⁸⁶Gk.: sindon. with [wool] tassels is permitted.⁸⁷See Numb. 15:37-38. And for [this commandment also] it is written, [that it is] an unquestioned statute. [Thus it is written (in Lev. 19:19),] “You shall keep My unquestioned statute. You shall not mate your cattle with a different kind…, [nor shall you wear a garment with diverse kinds of interwoven stuff].” In regard to the scapegoat, it is written (in Lev. 16:26), “And the one who sets the azazel-goat free shall wash his clothes”; yet it is [the goat] itself that atones for others. And for [this commandment also] it is written (in Lev. 16:34), “And this shall be to you an unquestioned statute forever.” In regard to the red heifer, where is it shown? Since we are taught (in Parah 4:4), “All engaged with the [rite of the red] heifer from beginning to end render [their] garments unclean”; yet it is [the heifer] itself that purifies [what is] unclean. And for [this commandment also] it is written, [that it is] an unquestioned statute. Thus it is written (in Numb. 19:2), “This is an unquestioned statute of the Torah.”

(Ibid. 20:8) "Remember the Sabbath day to sanctify it": "Remember" and "Keep" (the Sabbath day to sanctify it [Devarim 5:12]) were both stated in one pronouncement. (Exodus 31:14) "Its profaners shall be put to death" and (Numbers 28:9) "And on the Sabbath day, (sacrifice) two yearling lambs" were both stated in one pronouncement (Leviticus 18:16) "the nakedness of your brother's wife" and (Devarim 25:5) "Her yavam (levir, i.e., her brother-in-law) shall come upon her" were both stated in the same pronouncement. (Ibid. 22:11) "You shall not wear sha'atnez, wool and linen together" and (Ibid. 12) "Fringes (involving sha'atnez) shall you make for yourself" were both stated in the same pronouncement — something beyond the powers of a human being to say. As it is written (Psalms 62:12) "One thing has G d spoken, these two have I heard." (Jeremiah 23:29) "Is My word not like fire, says the L rd (and like a hammer shattering rock!")

9) "He has revealed the nakedness of his brother; they shall be childless (aririm)": If they have children, they bury their children; if they have no children, they die without children. And even though there is no proof for this, there is an "intimation" (i.e., Biblical support) for it, viz. (Jeremiah 29:30): "Write down this man as "ariri," etc." We have heard the punishment, but not the exhortation. It is, therefore, written (Jeremiah 18:16): "The nakedness of the wife of your brother you shall not reveal; she is the nakedness of your brother."