That is that He commanded us to administer the law of human appraisals. And that is one who says, "My appraisal is upon me," or "The appraisal of x is upon me": If he is a male, he pays such and such; but if she is a female, he pays such and such - according to the age - as appears in Scripture; and according to the condition of the appraiser (the financial situation of the one who makes this declaration). And that is His saying, "the appraisal of souls" (Leviticus 27:2). And the regulations of this commandment have already been explained in Tractate Arakhin. (See Parashat Bechukotai; Mishneh Torah, Appraisals and Devoted Property 1.)