Usage: 2 forms in 5 verses
Form Translated As     In Verse(s)
εξόπισθεν from behind LXX.1Chr.19.10LXX.Ps.78.71
from following LXX.1Chr.17.7
from following after LXX.1Kgs.19.21
εξόπισθε from following LXX.2Kgs.17.21

Liddell-Scott-Jones

ἐξόπισθεν (exopisthen) following G:PREP

ἐξόπισθεν-ισθεν,

poetry ἐξόπισθεν-ισθε, adverb, Attic dialect for ἐξόπισθενιθεν, [LXX+5th c.BC+]; εἰς τὸ . backwards, [Refs 5th c.BC+]

__II preposition with genitive, [LXX+5th c.BC+]

LSJ Scripture Refs: LXX.1Chr.19.10LXX.1Kgs.19.21