'Back' in the Bible

“You shall not see your countryman’s ox or his sheep straying away or being stolen, and ignore [your duty to help] them; you shall certainly take them back to him.

and you shall have a spade among your tools, and when you [prepare to] sit down outside [to relieve yourself], you shall dig a hole with it and shall turn and cover up your waste.

“When you reap your harvest in your field and have forgotten a sheaf [of grain] in the field, you shall not go back to get it; it shall be for the stranger, for the orphan, and for the widow, so that the Lord your God may bless you in all the work of your hands.

‘Cursed is he who moves his neighbor’s boundary mark.’ And all the people shall say, ‘Amen.’