He tells them, it is not their vain confidence in their privileges, and boasting of the temple, but only their serious and thorough repentance in turning to God, both in point of piety and equity, that can secure them. Between a man and his neighbour, i.e. impartially among one another, between man and man, without favour or hatred.
Related Commentaries of Jeremiah 7:5
Jeremiah 7:5
5 For if ye throughly amend your ways and your doings; if ye throughly execute judgment between a man and his neighbour;