Between us - Against us, as in Jeremiah 42:19 (margin.)
According to all things - literally, “according to the whole word as to which Yahweh thy God shall send thee to us.”
Related Commentaries of Jeremiah 42:5
Jeremiah 42:5
5 Then they said to Jeremiah, The LORD be a true and faithful witness between us, if we do not even according to all things for the which the LORD thy God shall send thee to us.