Reference

Leviticus 19:9

And when ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field, neither shalt thou gather the gleanings of thy harvest.
7

And if it be eaten at all on the third day, it is abominable; it shall not be accepted.

8

Therefore every one that eateth it shall bear his iniquity, because he hath profaned the hallowed thing of the Lord: and that soul shall be cut off from among his people.

9

And when ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field, neither shalt thou gather the gleanings of thy harvest.

10

And thou shalt not glean thy vineyard, neither shalt thou gather every grape of thy vineyard; thou shalt leave them for the poor and stranger: I am the Lord your God.

11

Ye shall not steal, neither deal falsely, neither lie one to another.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Land Sabbath / Rest for the Earth

This verse describes a practice related to harvesting and leaving portions for the poor, not a mandated period of rest for the land itself or a cycle of fallow fields.