Chronicles II 12:5

5 And Samaias the prophet came to Roboam, and to the princes of Juda that were gathered to Jerusalem for fear of Susakim, and said to them, Thus said the Lord, Ye have left me, and I will leave you in the hand of Susakim.

Chronicles II 12:5 Meaning and Commentary

2 Chronicles 12:5

Then came Shemaiah the prophet to Rehoboam
The same as in ( 2 Chronicles 11:2 ) , there called the man of God:

and to the princes of Judah that were gathered together to Jerusalem
because of Shishak;
through fear of him, and for safety and protection from him, and to consult what was to be done at this critical juncture, whether to fight him, or make peace with him on the best terms they could:

and said unto them, thus saith the Lord, ye have forsaken me;
his law, his word, worship, and ordinances, ( 2 Chronicles 12:1 ) ,

and therefore have I also left you in the hand of Shishak;
suffered him to invade their land, take their fenced cities, and come up to Jerusalem without any opposition, as a punishment of their apostasy; and to explain this providence to them, and call them to repentance, was the prophet sent.

Chronicles II 12:5 In-Context

3 with twelve hundred chariots, and sixty thousand horses: and there was no number of the multitude that came with him from Egypt; Libyans, Trogodytes, and Ethiopians.
4 And they obtained possession of the strong cities, which were in Juda, and came to Jerusalem.
5 And Samaias the prophet came to Roboam, and to the princes of Juda that were gathered to Jerusalem for fear of Susakim, and said to them, Thus said the Lord, Ye have left me, and I will leave you in the hand of Susakim.
6 And the elders of Israel and the king were ashamed, and said, The Lord righteous.
7 And when the Lord saw that they repented, then came the word of the Lord to Samaias, saying, They have repented; I will not destroy them, but I will set them in safety for a little while, and my wrath shall not be poured out on Jerusalem.

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