Shemaiah in Fausset's Bible Dictionary

1. A prophet under Rehoboam, commissioned to charge the king and his 180,000 warriors of Judah not to fight against their brethren of Israel, but to return every man to his house, instead of striving to regain northern Israel from Jeroboam (1 Kings 12:22; 2 Chronicles 11:2), for that the severance is Jehovah's doing; so they desisted in obedience to the Lord. Upon Rehoboam and his people forsaking Jehovah, and building high places, standing images, and groves, God sent Shishak of Egypt against Jerusalem; he then took all the fenced cities, and Shemaiah told Rehoboam and his princes, "thus saith Jehovah, Ye have forsaken Me, therefore have I also left you in the hand of Shishak." The princes then humbled themselves, saying, The Lord is righteous (Psalm 51:4; Leviticus 26:43). When Jehovah saw they humbled themselves He declared by Shemaiah, "I will not destroy them but grant them some deliverance, and My wrath shall not be poured out on Jerusalem by the hand of Shishak" (See REHOBOAM.) Shemaiah wrote a chronicle of Rehoboam's reign...