Sefer HaMitzvot, Positive Commandments
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היא שצונו בדין ערכי בהמה, והוא אמרו והעמיד הבהמה לפני ה' והעריך אותה הכהן. וכבר התבארו משפטי זו המצוה במסכת ערכין. (אם בחקותי, הפלאה הלכות ערכין פ"ה):
Sefaria Edition 2021, Translated by Rabbi Francis Nataf
That is that He commanded us with the law of animal appraisals. And that is His saying, "the animal shall be presented before the [priest]. And the priest shall appraise it" (Leviticus 27:11-12). And the regulations of this commandment have already been explained in Tractate Arakhin. (See Parashat Bechukotai; Mishneh Torah, Appraisals and Devoted Property 5.)