Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 247
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 247, with English translation by Maimonides (Rambam).
שלא לעשוק, שנאמר "לא תעשוק את ריעך" (ויקרא יט,יג).
Not to wrong [a colleague by withholding his due], as [Leviticus 19:13] states: "Do not wrong your neighbor."