民数記 19:2

וזאת חקת התורה THIS IS THE ORDINANCE OF THE LAW — Because Satan and the nations of the world taunt Israel, saying, “What is this command and what reason is there for it”, on this account it (Scripture) writes (uses) the term חקה about it, implying: It is an enactment from before Me; you have no right to criticize it (Yoma 67b; cf. Midrash Tanchuma, Chukat 7). ויקחו אליך THEY SHALL TAKE UNTO THEE — It will always be called by thy name: people will speak of the cow which Moses prepared in the wilderness (Midrash Tanchuma, Chukat 8). אדמה תמימה [A COW] RED, PERFECT — This means that it should be perfect in respect to its redness (Sifrei Bamidbar 123:1), — so that if there are two black hairs in it (or two of any color other than red) it is unfitted for the rite here described (Mishnah Parah 2:5).

זֹ֚את חֻקַּ֣ת הַתּוֹרָ֔ה אֲשֶׁר־צִוָּ֥ה יְהֹוָ֖ה לֵאמֹ֑ר דַּבֵּ֣ר ׀ אֶל־בְּנֵ֣י יִשְׂרָאֵ֗ל וְיִקְח֣וּ אֵלֶ֩יךָ֩ פָרָ֨ה אֲדֻמָּ֜ה תְּמִימָ֗ה אֲשֶׁ֤ר אֵֽין־בָּהּ֙ מ֔וּם אֲשֶׁ֛ר לֹא־עָלָ֥ה עָלֶ֖יהָ עֹֽל׃

This is the ordinance of the Tora which the Lord has commanded, saying, Speak to the children of Yisra᾽el, that they bring thee a red heifer without defect, in which there is no blemish, and upon which never came a yoke: