Kasher Yourself

 וַיֹּ֨אמֶר אֶלְעָזָ֤ר הַכֹּהֵן֙ אֶל⁠־אַנְשֵׁ֣י הַצָּבָ֔א הַבָּאִ֖ים לַמִּלְחָמָ֑ה זֹ֚את חֻקַּ֣ת הַתּוֹרָ֔ה אֲשֶׁר⁠־צִוָּ֥ה י״י֖ אֶת⁠־מֹשֶֽׁה אַ֥ךְ אֶת⁠־הַזָּהָ֖ב וְאֶת⁠־הַכָּ֑סֶף אֶֽת⁠־הַנְּחֹ֙שֶׁת֙ אֶת⁠־הַבַּרְזֶ֔ל אֶֽת⁠־הַבְּדִ֖יל וְאֶת⁠־הָעֹפָֽרֶת

Chafetz Chayim on the Torah:

In his intro. to Likutay Halachot (in the footnote) the C.C. says an interpretation on the possuk in reference to learning Torah (I copied the words from the Yalkut Lekech Tov for the typeset is clearer.)

With this idea we can explain why the possuk says חוקת התורה and not the chok of kashering or something like that, for these pessukim hint to the the chok of the Torah, the chok that Torah is able ot be machshir a person.