Matthew Poole and continuators on 2 Samuel 20:19

19 I am one of them that are peaceable and faithful in Israel : thou seekest to destroy a city, and a mother in Israel: why wilt thou swallow up the inheritance of the LORD ?

Or, I (to wit, the City of Abel, in whose Name and Person she speaks this) am one of the peaceable and faithful Cities of Israel. Whatsoever Sheba may design, whom we have innocently received into our City, before we well understood the matter; We of this City abhor the thoughts of Warring, and Rebelling against the King, as having had no hand in Absalom's late Rebellion: which is probable enough, considering both their Scituation in the utmost Borders of the Land, very remote from the Seat of that Civil War; and their open Profession of their Peaceableness, and Fidelity, or Loyalty to the King; which had been Impudent if they had been so lately Involved in the last War and Rebellion.

i e. A Mother City: for great Cities are commonly called Mothers; as lesser Towns or Villages subject to them, and depending upon them, for Direction and Defence, are called their Daughters, as Ezek. 16. 27, 46.

i. e. A considerable part of that Land which God hath chosen for his peculiar Possession. The Destruction which thou art about to bring upon us, is an injury also to Israel, and to the God of Israel.