Chronicles II 13:4

4 And Abia rose up from the mount Somoron, which is in mount Ephraim, and said, Hear ye, Jeroboam, and all Israel:

Chronicles II 13:4 Meaning and Commentary

2 Chronicles 13:4

And Abijah stood upon Mount Zemaraim, which is in Mount
Ephraim
Which might have its name from a city of Benjamin of this name, to which it was near, though within the borders of Ephraim, ( Joshua 18:22 ) formerly inhabited by the Zemarites, from whence it might have its name, ( Genesis 10:18 ) here Abijah stood, that he might be the better heard by the armies pitched in the valley; and very probably he desired a parley, and it was granted, otherwise he would not have been safe in the position in which he was;

and said, hear me, thou Jeroboam, and all Israel;
as many as were now gathered together, and which were a great number.

Chronicles II 13:4 In-Context

2 He reigned three years in Jerusalem. And his mother's name Maacha, daughter of Uriel of Gabaon. And there was war between Abia and Jeroboam.
3 And Abia set the battle in array with an army, with mighty men of war, four hundred thousand mighty men: and Jeroboam set the battle in array against him with eight hundred thousand, mighty warriors of the host.
4 And Abia rose up from the mount Somoron, which is in mount Ephraim, and said, Hear ye, Jeroboam, and all Israel:
5 not for you to know that the Lord God of Israel has given a king over Israel for ever to David, and to his sons, by a covenant of salt?
6 But Jeroboam the of Nabat, the servant of Solomon of David, is risen up, and has revolted from his master:

The Brenton translation of the Septuagint is in the public domain.