Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 271
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 271, with English translation by Maimonides (Rambam).
שלא לעשות עול במדה, שנאמר "לֹא תַעֲשׂוּ עָוֶל בַּמִּשְׁפָּט בְּמִדָּה" (ויקרא יט, לה); מפי השמועה למדו שהכתוב מזהיר לא תעשו עול במשפט המדה.
Not to falsify measurements, as [Leviticus 19:35] states: "Do not act deceitfully in judgment...." According to the oral tradition, we have learned that this verse prohibits acting deceitfully regarding measurements.