“When you reap your harvest in your field and have forgotten a sheaf in the field, you are not to turn back to get it. It is for the outsider, for the orphan and for the widow—in order that Adonai your God may bless you in all the work of your hands.
You must remember that you were a slave in the land of Egypt, and Adonai your God brought you out from there with a mighty hand and an outstretched arm. Therefore Adonai your God commanded you to keep Yom Shabbat.