Leviticus 19:1-10

Then the LORD spoke to Moses, saying, “Say to all the congregation of the children of Israel, ‘You shall be holy, for I the LORD your God am holy. [1 Pet 1:15] Each of you shall respect his mother and his father, and you shall keep My Sabbaths; I am the LORD your God. Do not turn to idols or make for yourselves molten gods (images cast in metal); I am the LORD your God. ‘Now when you offer a sacrifice of peace offerings to the LORD, you shall offer it so that you may be accepted. It shall be eaten the same day you offer it and on the day following; and if anything remains until the third day, it shall be burned in the fire. But if it is eaten at all on the third day, it is repulsive; it will not be accepted [by God as an offering]. Everyone who eats it will bear [the responsibility for] his wickedness, for he has profaned a holy thing of the LORD; and that person shall be cut off from his people [excluding him from the atonement made for them]. ‘Now when you reap the harvest of your land, you shall not reap to the very corners of your field, nor shall you gather the gleanings (grain left after reaping) of your harvest. And you shall not glean your vineyard, nor shall you gather its fallen grapes; you shall leave them for the poor and for the stranger. I am the LORD your God.