Not to eat Tevel. Tevel is produce of the soil, from which heave-offering and tithes have to be separated, so-called before this has been done

Maimonides

Not to eat Tevel. Tevel is produce of the soil, from which heave-offering and tithes have to be separated, so-called before this has been done, as it is said, “And they shall not profane the holy things of the children of Israel which they offer to the Lord” (Lev. 22:15). This means that things from which a portion has to be separated to the Lord must not be regarded as secular and eaten before the separation has taken place.