Josephus used the name Idumaea as including not only Gobalitis, the original Mount Seir, but also Amalekitis, the land of Amalek, west of this, and Akrabatine, the ancient Acrabbim,, S.W.
It is of uncertain date; if the historical Amalek is meant, it may be early; but Amalek may be symbolical.
The Battle with Amalek at Rephidim.-This incident is derived from E, but is clearly out of place in its present context.
Bless his counsels, his undertakings, and his work; strengthen his kingdom by Thine almighty hand, and give him victory over his enemy, even as Thou gavest Moses the victory over Amalek, Gideon over Midian, and David over Goliath.
The question is further complicated by the account of Joshua's overthrow of Amalek apparently in the Sinaitic peninsula.