'Behind' in the Bible

are they not beyond the Jordan, behind the way of the going in of the sun, in the land of the Canaanite, who is dwelling in the plain over-against Gilgal, near the oaks of Moreh?

'When thou beatest thine olive, thou dost not examine the branch behind thee; to the sojourner, to the fatherless, and to the widow, it is.

'When thou cuttest thy vineyard, thou dost not glean behind thee; to the sojourner, to the fatherless, and to the widow, it is;

that he hath met thee in the way, and smiteth in all those feeble behind thee (and thou wearied and fatigued), and is not fearing God.