אָ֗ח נִפְשָׁ֥ע מִקִּרְיַת־עֹ֑ז ומדונים [וּ֝מִדְיָנִ֗ים] כִּבְרִ֥יחַ אַרְמֽוֹן׃
背叛兄弟的人，就失去堅固的城；紛爭好像宮殿的門閂。
Rashi
And the Israelites rebelled against the house of David - Heb. וַיִפְשְׁעוּ, an expression of rebellion. Examples are (II Kings 1:1): “Moab rebelled (וַיִפְשַׁע) against Israel”; (Prov. 18:19): “A rebellious (נִפְשַׁע) brother”; (below 27:19): “then Libnah rebelled (תִּפְשַׁע).”