Midrasch zu Wajikra 20:22

4) (Vayikra 20:22) "And you shall heed all of My statutes and all of My judgments, and you shall do them": to assign heeding and doing for statutes, and heeding and doing for judgments. (Vayikra 20:22) "and the land will not vomit you out, whither I bring you, to dwell in it": I bring you there to inherit it — not as the Canaanites, who were caretakers of the place until your coming.

5 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).⁴⁷Although 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.”⁴⁸PR 14:12; 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 cloak⁴⁹Gk.: sindon. with [wool] tassels is permitted.⁵⁰See 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 garments. 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.”

In regard to the nakedness of a brother's wife, where is it shown? Where it is written (in Lev. 18:16): YOU SHALL NOT UNCOVER THE NAKEDNESS OF YOUR BROTHER's WIFE; yet it is written (in Deut. 25:5): HER BROTHER-IN-LAW SHALL HAVE SEXUAL INTERCOURSE WITH HER <AND TAKE HER FOR A WIFE>. During <her husband's> lifetime, she is forbidden; <but> upon <his> death with no children, she is permitted to <a brother-in-law>. Moreover, for <this commandment> it is written <that it is> an unquestioned statute. Thus it is written (in Lev. 20:22): AND YOU SHALL KEEP [ALL] MY UNQUESTIONED STATUTES.
In regard to diverse kinds, where is it shown? Where it is written (in Deut. 22:11): AND YOU SHALL NOT WEAR INTERWOVEN STUFF, <WOOL AND FLAX TOGETHER>; yet a linen cloak¹¹⁸Gk.: sindon. with <wool> tassels is permitted.¹¹⁹See Numb. 15:37-38. Moreover, 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, where is it shown? Where it is written (in Lev. 16:26): AND THE ONE WHO SETS THE AZAZEL-GOAT FREE <SHALL WASH HIS CLOTHES, BATHE HIS FLESH IN WATER, AND AFTER THAT MAY COME INTO THE CAMP>; yet it is <the goat> itself that atones for others. Moreover, for <this commandment also> it is written, <that it is> an unquestioned statute. Thus 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? There where 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. Moreover, 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.