וְשָׁמַעְתָּ֙ מִן־הַשָּׁמַ֔יִם אֶת־תְּפִלָּתָ֖ם וְאֶת־תְּחִנָּתָ֑ם וְעָשִׂ֖יתָ מִשְׁפָּטָֽם׃
potem wysłuchajcie z nieba ich modlitwy i błagania, i podtrzymujcie ich sprawę.
Rashi on II Chronicles
and maintain their cause their revenge from their enemies. Another meaning is: their necessities. A similar instance is (I Kings 8:59): “that He sustain the cause of His servant.”