Charles Ellicott Commentary 2 Chronicles 25:10

"Then Amaziah separated them, [to wit], the army that was come to him out of Ephraim, to go home again: wherefore their anger was greatly kindled against Judah, and they returned home in fierce anger." — 2 Chronicles 25:10 (ASV)

Namely, the army. — The troop (le prefixed, as a sign of the accusative).

To go home again. — To go to their own place.

Home in great anger. — To their own place in a heat of anger (Isaiah 7:4). Obviously, the dismissed force would be incensed at treatment which seemed to indicate distrust of their honour, and robbed them of the possible fruits of victory. On their way home, they revenged themselves by plundering and slaughtering in the cities of Judah (2 Chronicles 25:13).